Align repo with the extension template (Backport #168)

[martinRenou]

• Align with the extension template

• Lint

• Update tsconfig.json

• Fix prettier config

• Disable noImplicitAny for now

• Fix outputDir

• Fix handling of _version.py

• Update check-release workflow

• Update actions/checkout

• Install empack

• Restore addon and script

• Add empack to build deps

• Remove _version.py

• Update init

[github-actions[bot]]

:point_left: Try it on ReadTheDocs