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/system/benchmark.rs

@@ -4,7 +4,8 @@ use nu_engine::{eval_block, CallExt};
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Closure, Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, SyntaxShape, Type,
+    Value,
 };
 
 #[derive(Clone)]
@@ -40,7 +41,7 @@ impl Command for Benchmark {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let capture_block: Closure = call.req(engine_state, stack, 0)?;
         let block = engine_state.get_block(capture_block.block_id);
 

crates/nu-command/src/system/complete.rs

@@ -34,7 +34,7 @@ impl Command for Complete {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         match input {
             PipelineData::ExternalStream {
                 stdout,

crates/nu-command/src/system/exec.rs

@@ -37,7 +37,7 @@ impl Command for Exec {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         exec(engine_state, stack, call)
     }
 
@@ -61,7 +61,7 @@ fn exec(
     engine_state: &EngineState,
     stack: &mut Stack,
     call: &Call,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let name: Spanned<String> = call.req(engine_state, stack, 0)?;
     let name_span = name.span;
 

crates/nu-command/src/system/ps.rs

@@ -41,7 +41,7 @@ impl Command for Ps {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         run_ps(engine_state, call)
     }
 

crates/nu-command/src/system/registry_query.rs

@@ -69,7 +69,7 @@ impl Command for RegistryQuery {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         registry_query(engine_state, stack, call)
     }
 
@@ -93,7 +93,7 @@ fn registry_query(
     engine_state: &EngineState,
     stack: &mut Stack,
     call: &Call,
-) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+) -> Result<PipelineData, ShellError> {
     let call_span = call.head;
 
     let registry_key: Spanned<String> = call.req(engine_state, stack, 0)?;

crates/nu-command/src/system/sys.rs

@@ -33,7 +33,7 @@ impl Command for Sys {
         _stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         run_sys(call)
     }
 

crates/nu-command/src/system/which_.rs

@@ -44,7 +44,7 @@ impl Command for Which {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, nu_protocol::ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         which(engine_state, stack, call)
     }