Added pre-commit workflow

[Bazifrasool]

ci: added pre-commit workflow This PR addresses : https://github.com/google/flatbuffers/issues/7615

contains a pre-commit workflow that has :

  - check-executables-have-shebangs
  - check-toml
  - check-yaml
  - end-of-file-fixer
  - trailing-whitespace
  - requirements-txt-fixer

It has several fixes for the current.Need a bit of help to conform current codebase to the specified rules or add more.

[Bazifrasool]

@dbaileychess for review