[WIP] Pre-Commit: Clang-Format CXX Endings

[ax3l]

identify used to detect our files does not catch all our file endings.

Refs.:

• https://pre-commit.com/#pre-commit-configyaml---hooks
• https://pre-commit.com/#filtering-files-with-types
  • https://pre-commit.com/#regular-expressions
• https://github.com/pre-commit/mirrors-clang-format
• https://github.com/ssciwr/clang-format-wheel#use-from-pre-commit
• Support .in files (or just cmake.in) pre-commit/identify#119
• https://github.com/pybind/pybind11/blob/v2.9.1/.pre-commit-config.yaml#L96-L103

[ax3l]

This does not yet seem to work 🤔
Should be python regex: https://pre-commit.com/#regular-expressions

[ax3l]

Once this works, I to also need to add .json here as we use this for json formatting as well #1222

[franzpoeschel]

You were right, .tpp files are not yet considered by the manual script https://github.com/openPMD/openPMD-api/blob/dev/.github/workflows/clang-format/clang-format.sh

[franzpoeschel]

Otherwise, this PR has been mainly obsoleted by #1403