Fixed support for env files

[Tiggax]

This pull adds support to activate environmental directories referenced in issue #401.

Currently the script works with directories passed as argument, but it doesn't autocomplete them.
might add that later on.

[Hofer-Julian]

Looks good to me

[Tiggax]

This pull now has added autocomplete for venv folders, but the function is getting really slow.

[Hofer-Julian]

This pull now has added autocomplete for venv folders, but the function is getting really slow.

Always, or only when trying to auto complete?

[Tiggax]

the script calls conda multiple times during its run. in the past this resulted in a 1-3 sec wait time after running conda activate <env> or autocompletion, but is getting longer.
for autocompletion i didn't know how to solve it, since the names are parsed from raw output of conda info --envs but folders in path are checked using conda info --json | form json. Multiple functions call conda info to fetch information about the instance, but the call takes almost a second to complete, which results in long conda activation times.

I've been wandering to maybe refactor the script to improve its speed, or maybe move to nu_conda.nu.

TL;DR only takes longer when trying to autocomplete

[Hofer-Julian]

I've been wandering to maybe refactor the script to improve its speed, or maybe move to nu_conda.nu.

That would be much appreciated. Within this PR or in a follow up is then up to you

TL;DR only takes longer when trying to autocomplete

👍

[Tiggax]

Within this PR or in a follow up is then up to you

Possibly in a follow up PR

[Hofer-Julian]

My feeling is that we should remove autocompletion of paths for now and try again after we refactored/sped up the script.

[Hofer-Julian]

Thank you!