Add `.pdm-python` to python gitignore

[SRv6d]

Reasons for making this change:

Starting with v2.5.0b0 pdm requires a .pdm-python file to track the path of the local python installation.

Links to documentation supporting these rule changes:

v2.5.0b0

If this is a new template:

• Link to application or project’s homepage: https://pdm.fming.dev

[thiagola92]

Can this be merged? Everything looks good to me.

Reference: https://pdm.fming.dev/dev/usage/project/#working-with-version-control

You must commit the pyproject.toml file. You should commit the pdm.lock and pdm.toml file. Do not commit the .pdm-python file.

[DavidArmendariz]

Merge this already please!