Antoine Stevan 6af59cb0ea
FEATURE: add a path add to the standard library (#8303)
# Description
this PR adds the `path add` command to
`crates/nu-utils/standard_library/std.nu`
- this comes from frequent questions over on the discord server, about
how to add directories to the `PATH`
- this is greatly inspired from the [original
`path-add`](https://discord.com/channels/601130461678272522/615253963645911060/1081206660816699402)
from @melMass
- allows to prepend and append a variable number of directories to the
`PATH`
- i've added a description with an example
- i've added tests in `crates/nu-utils/standard_library/tests.nu` that
hopefully covers all the features

# User-Facing Changes
`path add` can now be used from `std.nu`

# Tests + Formatting
the tests pass with
```bash
nu crates/nu-utils/standard_library/tests.nu
```

# After Submitting
```bash
$nothing
```
2023-03-07 17:06:14 -06:00
..