Rpgpy

- Distribute package only as source distribution

- Remove DEF that will be deprecated
- Unlock numba version

- Raise RPGFileError if file reading fails

- Support Python 3.11

- Fix numpy warnings
- Change velocity vectors to ordinary numpy array

- Add support for RPG version 1 files
- Change RPG file version 3 to 3.5
- Write `rpg_file_version` attribute to netCDF output
- Add py.typed to enable type checking