Add command_prelude module (#12291)

# Description
When implementing a `Command`, one must also import all the types
present in the function signatures for `Command`. This makes it so that
we often import the same set of types in each command implementation
file. E.g., something like this:
```rust
use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{
    record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
    ShellError, Signature, Span, Type, Value,
};
```

This PR adds the `nu_engine::command_prelude` module which contains the
necessary and commonly used types to implement a `Command`:
```rust
// command_prelude.rs
pub use crate::CallExt;
pub use nu_protocol::{
    ast::{Call, CellPath},
    engine::{Command, EngineState, Stack},
    record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, IntoSpanned,
    PipelineData, Record, ShellError, Signature, Span, Spanned, SyntaxShape, Type, Value,
};
```

This should reduce the boilerplate needed to implement a command and
also gives us a place to track the breadth of the `Command` API. I tried
to be conservative with what went into the prelude modules, since it
might be hard/annoying to remove items from the prelude in the future.
Let me know if something should be included or excluded.

crates/nu-command/src/platform/ansi/ansi_.rs

@@ -1,16 +1,11 @@
 use nu_ansi_term::*;
-use nu_engine::CallExt;
-use nu_protocol::{
-    ast::Call,
-    engine::Command,
-    engine::StateWorkingSet,
-    engine::{EngineState, Stack},
-    record, Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData,
-    ShellError, Signature, Span, SyntaxShape, Type, Value,
-};
+use nu_engine::command_prelude::*;
+use nu_protocol::engine::StateWorkingSet;
 use once_cell::sync::Lazy;
-use std::collections::HashMap;
-use std::sync::{atomic::AtomicBool, Arc};
+use std::{
+    collections::HashMap,
+    sync::{atomic::AtomicBool, Arc},
+};
 
 #[derive(Clone)]
 pub struct AnsiCommand;

crates/nu-command/src/platform/ansi/link.rs

@@ -1,12 +1,4 @@
-use nu_engine::CallExt;
-use nu_protocol::{
-    ast::{Call, CellPath},
-    engine::Command,
-    engine::EngineState,
-    engine::Stack,
-    Category, Example, PipelineData, ShellError, Signature, Span, Spanned, SyntaxShape, Type,
-    Value,
-};
+use nu_engine::command_prelude::*;
 
 #[derive(Clone)]
 pub struct SubCommand;

crates/nu-command/src/platform/ansi/strip.rs

@@ -1,10 +1,6 @@
 use nu_cmd_base::input_handler::{operate, CmdArgument};
-use nu_engine::CallExt;
-use nu_protocol::{
-    ast::{Call, CellPath},
-    engine::{Command, EngineState, Stack},
-    Category, Config, Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Type, Value,
-};
+use nu_engine::command_prelude::*;
+use nu_protocol::Config;
 
 pub struct Arguments {
     cell_paths: Option<Vec<CellPath>>,

crates/nu-command/src/platform/clear.rs

@@ -3,10 +3,8 @@ use crossterm::{
     terminal::{Clear as ClearCommand, ClearType},
     QueueableCommand,
 };
-use nu_engine::CallExt;
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Type};
+use nu_engine::command_prelude::*;
+
 use std::io::Write;
 
 #[derive(Clone)]

crates/nu-command/src/platform/dir_info.rs

@@ -1,9 +1,10 @@
 use filesize::file_real_size_fast;
 use nu_glob::Pattern;
 use nu_protocol::{record, ShellError, Span, Value};
-use std::path::PathBuf;
-use std::sync::atomic::AtomicBool;
-use std::sync::Arc;
+use std::{
+    path::PathBuf,
+    sync::{atomic::AtomicBool, Arc},
+};
 
 #[derive(Debug, Clone)]
 pub struct DirBuilder {

crates/nu-command/src/platform/input/input_.rs

@@ -6,15 +6,9 @@ use crossterm::{
     terminal::{self, ClearType},
 };
 use itertools::Itertools;
-use nu_engine::CallExt;
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Spanned, SyntaxShape,
-    Type, Value,
-};
-use std::io::Write;
-use std::time::Duration;
+use nu_engine::command_prelude::*;
+
+use std::{io::Write, time::Duration};
 
 #[derive(Clone)]
 pub struct Input;

crates/nu-command/src/platform/input/input_listen.rs

@@ -3,13 +3,8 @@ use crossterm::event::{
     EnableMouseCapture, KeyCode, KeyEventKind, KeyModifiers, MouseEvent, MouseEventKind,
 };
 use crossterm::terminal;
-use nu_engine::CallExt;
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    record, Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span,
-    SyntaxShape, Type, Value,
-};
+use nu_engine::command_prelude::*;
+
 use num_traits::AsPrimitive;
 use std::io::stdout;
 

crates/nu-command/src/platform/input/list.rs

@@ -1,12 +1,6 @@
-use dialoguer::{console::Term, Select};
-use dialoguer::{FuzzySelect, MultiSelect};
-use nu_engine::CallExt;
-use nu_protocol::ast::{Call, CellPath};
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type,
-    Value,
-};
+use dialoguer::{console::Term, FuzzySelect, MultiSelect, Select};
+use nu_engine::command_prelude::*;
+
 use std::fmt::{Display, Formatter};
 
 enum InteractMode {

crates/nu-command/src/platform/is_terminal.rs

@@ -1,9 +1,5 @@
-use nu_engine::CallExt;
-use nu_protocol::{
-    ast::Call,
-    engine::{Command, EngineState, Stack},
-    span, Category, Example, PipelineData, ShellError, Signature, Type, Value,
-};
+use nu_engine::command_prelude::*;
+use nu_protocol::span;
 use std::io::IsTerminal as _;
 
 #[derive(Clone)]

crates/nu-command/src/platform/kill.rs

@@ -1,10 +1,5 @@
-use nu_engine::CallExt;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{ast::Call, span};
-use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, IntoPipelineData, PipelineData, ShellError,
-    Signature, Spanned, SyntaxShape, Type, Value,
-};
+use nu_engine::command_prelude::*;
+use nu_protocol::span;
 use std::process::{Command as CommandSys, Stdio};
 
 #[derive(Clone)]

crates/nu-command/src/platform/sleep.rs

@@ -1,10 +1,5 @@
-use nu_engine::CallExt;
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, SyntaxShape,
-    Type, Value,
-};
+use nu_engine::command_prelude::*;
+
 use std::{
     thread,
     time::{Duration, Instant},

crates/nu-command/src/platform/term_size.rs

@@ -1,8 +1,4 @@
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    record, Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
-};
+use nu_engine::command_prelude::*;
 use terminal_size::{terminal_size, Height, Width};
 
 #[derive(Clone)]

crates/nu-command/src/platform/ulimit.rs

@@ -1,11 +1,6 @@
 use nix::sys::resource::{rlim_t, Resource, RLIM_INFINITY};
-use nu_engine::CallExt;
-use nu_protocol::{
-    ast::Call,
-    engine::{Command, EngineState, Stack},
-    Category, Example, IntoPipelineData, PipelineData, Record, ShellError, Signature, Span,
-    SyntaxShape, Type, Value,
-};
+use nu_engine::command_prelude::*;
+
 use once_cell::sync::Lazy;
 
 /// An object contains resource related parameters

crates/nu-command/src/platform/whoami.rs

@@ -1,8 +1,4 @@
-use nu_protocol::ast::Call;
-use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
-};
+use nu_engine::command_prelude::*;
 
 #[derive(Clone)]
 pub struct Whoami;