Add static analysis tools and workflows to the repo

[kyteinsky]

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Feature request

See

https://github.com/nextcloud/live_transcription/blob/master/pyproject.toml
https://github.com/nextcloud/live_transcription/blob/master/.pre-commit-config.yaml
https://github.com/nextcloud/live_transcription/blob/master/.github/workflows/static-analysis.yml