Move test runner to standard library.
Originated from #8819
# After Submitting
I'll update the documentation about testing:
http://www.nushell.sh/book/testing.html
---------
Co-authored-by: Mate Farkas <Mate.Farkas@oneidentity.com>
> **Note**
> waiting for
> - https://github.com/nushell/nushell/pull/8770
> - #8815
# Description
this PR adds a very basic completion support to the `help`
implementations of the `std`.
# User-Facing Changes
completion on all the `std help ...` commands, based on the names in
`$nu.scope.`
# Tests + Formatting
- ⚫ `toolkit fmt`
- ⚫ `toolkit clippy`
- ⚫ `toolkit test`
- ⚫ `toolkit test stdlib`
# After Submitting
```
$nothing
```
