Keep an up-to-date .pre-commit-config.yaml in template subdir

[imagejan]

Our current pre-commit.ci workflow updates the .pre-commit-config.yaml in the repository root, but doesn't check the file inside the template subfolder.

Also, we should consider using ruff (both check and format), remove redundant others (e.g. black), and maybe add a ruff.toml to the project template (if we want to deviate from defaults).

[tibuch]

I don't know if there exists an easy way to automate this.

Maybe we can create a git workflow which copies the template, runs pre-commit update, and feeds the changes into the template?

Not sure if this is worth the effort, or if we just need to do it manually from time to time.

[imagejan]

We activated the pre-commit.ci bot for example-project as well, so we need to remember updating it here whenever we merge a pre-commit PR on https://github.com/fmi-faim/example-project.

Leaving this open to track updates.

[tibuch]

Updated with 372aecc.