add input_output_types() to benchmark,cd and config reset (#7455)

# Description

add input_output_types() to benchmark, cd and config reset commands
It's an update to https://github.com/nushell/nushell/issues/7320


# 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/env/config/config_reset.rs

@@ -2,7 +2,7 @@ use chrono::Local;
 use nu_protocol::{
     ast::Call,
     engine::{Command, EngineState, Stack},
-    Category, Example, PipelineData, ShellError, Signature,
+    Category, Example, PipelineData, ShellError, Signature, Type,
 };
 use nu_utils::{get_default_config, get_default_env};
 use std::io::Write;
@@ -20,6 +20,8 @@ impl Command for ConfigReset {
             .switch("nu", "reset only nu config, config.nu", Some('n'))
             .switch("env", "reset only env config, env.nu", Some('e'))
             .switch("without-backup", "do not make a backup", Some('w'))
+            .input_output_types(vec![(Type::Nothing, Type::Nothing)])
+            .allow_variants_without_examples(true)
             .category(Category::Env)
     }