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-cli/src/eval_file.rs

@@ -1,21 +1,17 @@
-use std::sync::Arc;
-
 use crate::util::eval_source;
-use log::info;
-use log::trace;
+use log::{info, trace};
 use miette::{IntoDiagnostic, Result};
-use nu_engine::eval_block;
-use nu_engine::{convert_env_values, current_dir};
+use nu_engine::{convert_env_values, current_dir, eval_block};
 use nu_parser::parse;
 use nu_path::canonicalize_with;
-use nu_protocol::debugger::WithoutDebug;
-use nu_protocol::report_error;
 use nu_protocol::{
     ast::Call,
+    debugger::WithoutDebug,
     engine::{EngineState, Stack, StateWorkingSet},
-    Config, PipelineData, ShellError, Span, Value,
+    report_error, Config, PipelineData, ShellError, Span, Value,
 };
 use nu_utils::stdout_write_all_and_flush;
+use std::sync::Arc;
 
 /// Main function used when a file path is found as argument for nu
 pub fn evaluate_file(