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/formats/to/command.rs

@@ -31,7 +31,7 @@ impl Command for To {
         stack: &mut Stack,
         call: &Call,
         _input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: get_full_help(
                 &To.signature(),

crates/nu-command/src/formats/to/csv.rs

@@ -65,7 +65,7 @@ impl Command for ToCsv {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let noheaders = call.has_flag("noheaders");
         let separator: Option<Spanned<String>> = call.get_flag(engine_state, stack, "separator")?;

crates/nu-command/src/formats/to/html.rs

@@ -157,7 +157,7 @@ impl Command for ToHtml {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         to_html(input, call, engine_state, stack)
     }
 }

crates/nu-command/src/formats/to/json.rs

@@ -43,7 +43,7 @@ impl Command for ToJson {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let raw = call.has_flag("raw");
         let use_tabs = call.has_flag("tabs");
 

crates/nu-command/src/formats/to/md.rs

@@ -70,7 +70,7 @@ impl Command for ToMd {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let pretty = call.has_flag("pretty");
         let per_element = call.has_flag("per-element");

crates/nu-command/src/formats/to/nuon.rs

@@ -33,7 +33,7 @@ impl Command for ToNuon {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         Ok(Value::String {
             val: to_nuon(call, input)?,
             span: call.head,

crates/nu-command/src/formats/to/text.rs

@@ -30,7 +30,7 @@ impl Command for ToText {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let span = call.head;
         let config = engine_state.get_config();
 

crates/nu-command/src/formats/to/toml.rs

@@ -36,7 +36,7 @@ impl Command for ToToml {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         to_toml(engine_state, input, head)
     }

crates/nu-command/src/formats/to/xml.rs

@@ -60,7 +60,7 @@ impl Command for ToXml {
         stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         let config = engine_state.get_config();
         let pretty: Option<Spanned<i64>> = call.get_flag(engine_state, stack, "pretty")?;

crates/nu-command/src/formats/to/yaml.rs

@@ -36,7 +36,7 @@ impl Command for ToYaml {
         _stack: &mut Stack,
         call: &Call,
         input: PipelineData,
-    ) -> Result<nu_protocol::PipelineData, ShellError> {
+    ) -> Result<PipelineData, ShellError> {
         let head = call.head;
         to_yaml(input, head)
     }