duniterpy#169: Update pre-commit doc. Document CI linter hook usage

Give the choices to install pre-commit via the distrib or via pip

changed milestone to %0.10.0

added CI/CD Dev Env Documentation labels

approved this merge request

assigned to @moul and unassigned @matograine

added 2 commits

• 7645a726 - 1 commit from branch dev
• d746a423 - [doc] duniterpy#169 (closed): Update pre-commit doc. Document CI linter hook usage

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resolved all threads

enabled an automatic merge when the pipeline for d746a423 succeeds

merged