pre-commit docs: missing .pre-commit-config.yaml?

[soxofaan]

f6a39c9f1a0c9521c254ac5d00d895cf6ecf2728 added https://github.com/Open-EO/FuseTS/blob/main/docs/source/maintenance.rst and https://github.com/Open-EO/FuseTS/blob/main/docs/source/maintenance.rst#pre-commit-for-basic-code-quality-checks discusses pre-commit, but fusets repo does not provide .pre-commit-config.yaml to make that work