This PR Improve docs build ci

[soot-bit]

This PR Improve docs build ci

Changes:

• removed redundant dependencies (git, make, python3-venv) from the GitHub Actions workflow, as they are preinstalled on ubuntu-latest runners.
• Removed deprecated panels_add_bootstrap_css
• Created _static directory to resolve warnings.

Testing:

• Verified locally with make html (no errors/warnings).

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[dvrogozh]

#1333 already addressed docs build. This PR suggests some improvements on top. I think it's better to change PR title accordingly saying for example "Improve docs build ci"

[dvrogozh]

Created _static directory to resolve warnings.

You don't do that in the PR. Or that's done implicit?

Fix documentation build: GitHub Actions, Sphinx 5.3.0, and theme comp…

I suggest to change PR title to "Improved documentation ci build"

[dvrogozh]

The _static directory was explicitly created in this PR to resolve sphinx warnings about missing paths.

You don't have this in your PR code change. Did you forget to amend?

[soot-bit]

The _static directory was explicitly created in this PR to resolve sphinx warnings about missing paths.

You don't have this in your PR code change. Did you forget to amend?

its here ,

[dvrogozh]

its here

I overlooked it. Thank you for pointing out.

[dvrogozh]

LGTM. @msaroufim, can you, please, take a look on this PR?