ci: add more pre-commit hooks, and clean up what the hooks flagged

[jenstroeger]

I added a bunch of new pre-commit hooks, and they reformatted the YAML and TOML files and found a few minor issues. Note, though, that said reformatting removed comments…

Bummer that I still haven’t figured out why three hooks run on git push when only one is configured to do so:

> git push --set-upstream origin pre-commit-improvements
Fix End of Files.........................................................Passed
Trim Trailing Whitespace.................................................Passed
tox......................................................................Passed

[jenstroeger]

Bummer that I still haven’t figured out why three hooks run on git push when only one is configured to do so:

> git push --set-upstream origin pre-commit-improvements
Fix End of Files.........................................................Passed
Trim Trailing Whitespace.................................................Passed
tox......................................................................Passed

So, the default configuration for these hooks contains

    stages: [commit, push, manual]

which is why the above hooks run on commit and push. Fixed to run on commit only. I also added a name to most hooks to print a more readable output. Lastly, I removed language specific versions from the hooks to give them more flexibility wrt. to the hosting venv.