Separate the installation of pre-commit to -f|--format case

[AndrejOrsula]

Description

This PR separates the installation of pre-commit from the main installation via orbit.sh -i|--install into the already existing -f|--format case.

This means that end-users are no longer required to install pre-commit when using the included orbit.sh -i|--install option, which should simplify the Dockerfile layers (#17).

With this PR, pre-commit is automatically installed with orbit.sh -f|--format option if its command is not detected on the system. Furthermore, this PR makes sure that pre-commit run is always executed in the correct directory regardless of ${PWD} when calling orbit.sh -f|--format . Contributors are already informed to run pre-commit via the PR checklist found in the template (as seen below).

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist

• I have run the pre-commit checks with pre-commit run --all-files (see here instructions to set it up)
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have updated the changelog and the corresponding version in the extension's config/extension.toml file

[Mayankm96]

We should probably make doc changes at the following places to only use the bash utilities instead of pre-commit. What do you think?

• PR Checklist: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/.github/PULL_REQUEST_TEMPLATE.md#checklist
• Developer's Guide: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/docs/source/setup/developer.rst#code-style
• PR Guideline: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/docs/source/refs/contributing.rst#coding-style

[AndrejOrsula]

We should probably make doc changes at the following places to only use the bash utilities instead of pre-commit. What do you think?

• PR Checklist: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/.github/PULL_REQUEST_TEMPLATE.md#checklist
• Developer's Guide: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/docs/source/setup/developer.rst#code-style
• PR Guideline: https://github.com/NVIDIA-Omniverse/Orbit/blob/main/docs/source/refs/contributing.rst#coding-style

I added instructions to use ./orbit.sh --format instead of pre-commit run --all-files in those three files. I don't know if there's a better way of formatting it (I think that ./orbit.sh --format is more informative than ./orbit.sh -f).
In one of the files, I also removed a link to the installation instructions of pre-commit as it is done automatically via ./orbit.sh -f|--format now.

Please, review this change (ceaf2a0).

[Mayankm96]

Yeah, I agree. The flag --format is more explicit for users.

I slowly want to make the dependency on being on top of the repo to run orbit.sh a bit obsolete. The solution to add this script to the ~/.bashrc is alright but I think it doesn't scale well when one has multiple clones of the repo.

Anyway, that's for another discussion. I'll merge and close this one for now. Thanks a lot!