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/system/benchmark.rs

@@ -4,7 +4,7 @@ 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, Value,
+    Category, Example, IntoPipelineData, PipelineData, Signature, SyntaxShape, Type, Value,
 };
 
 #[derive(Clone)]
@@ -22,6 +22,8 @@ impl Command for Benchmark {
     fn signature(&self) -> nu_protocol::Signature {
         Signature::build("benchmark")
             .required("block", SyntaxShape::Block, "the block to run")
+            .input_output_types(vec![(Type::Block, Type::String)])
+            .allow_variants_without_examples(true)
             .category(Category::System)
     }