Use imported names in Command::run signatures (#7967)

# Description

_(Thank you for improving Nushell. Please, check our [contributing
guide](../CONTRIBUTING.md) and talk to the core team before making major
changes.)_

I opened this PR to unify the run command method. It's mainly to improve
consistency across the tree.

# User-Facing Changes

None.

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/src/date/format.rs

@@ -50,7 +50,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         if call.has_flag("list") {
             return Ok(PipelineData::Value(

crates/nu-command/src/date/humanize.rs

@@ -45,7 +45,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/list_timezone.rs

@@ -2,7 +2,8 @@ use chrono_tz::TZ_VARIANTS;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoInterruptiblePipelineData, PipelineData, Signature, Span, Type, Value,
+    Category, Example, IntoInterruptiblePipelineData, PipelineData, ShellError, Signature, Span,
+    Type, Value,
 };
 
 #[derive(Clone)]
@@ -33,7 +34,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
 
         Ok(TZ_VARIANTS

crates/nu-command/src/date/now.rs

@@ -1,7 +1,9 @@
 use chrono::Local;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::{Category, Example, IntoPipelineData, PipelineData, Signature, Type, Value};
+use nu_protocol::{
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Type, Value,
+};
 #[derive(Clone)]
 pub struct SubCommand;
 
@@ -30,7 +32,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let dt = Local::now();
         Ok(Value::Date {

crates/nu-command/src/date/to_record.rs

@@ -2,11 +2,11 @@ use crate::date::utils::parse_date_from_string;
 use chrono::{DateTime, Datelike, FixedOffset, Local, Timelike};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::Type;
 use nu_protocol::{
     Category, Example, PipelineData, ShellError::DatetimeParseError, ShellError::PipelineEmpty,
     Signature, Span, Value,
 };
+use nu_protocol::{ShellError, Type};
 
 #[derive(Clone)]
 pub struct SubCommand;
@@ -40,7 +40,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/to_table.rs

@@ -2,11 +2,11 @@ use crate::date::utils::parse_date_from_string;
 use chrono::{DateTime, Datelike, FixedOffset, Local, Timelike};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
-use nu_protocol::Type;
 use nu_protocol::{
     Category, Example, PipelineData, ShellError::DatetimeParseError, ShellError::PipelineEmpty,
     Signature, Span, Value,
 };
+use nu_protocol::{ShellError, Type};
 
 #[derive(Clone)]
 pub struct SubCommand;
@@ -40,7 +40,7 @@ impl Command for SubCommand {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         // This doesn't match explicit nulls
         if matches!(input, PipelineData::Empty) {

crates/nu-command/src/date/to_timezone.rs

@@ -52,7 +52,7 @@ impl Command for SubCommand {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let timezone: Spanned<String> = call.req(engine_state, stack, 0)?;