We need some automated validation for PRs

[Fris0uman]

For each PR we need a few things:

• Check that the json files are written properly and do point to an actual sound GHA combined JSON validation workflow #31
• Check that there is no sound file that is not referenced by any json GHA workflow to check sound file references / credits #32
• Check that every soundfile has a credits.txt entry GHA workflow to check sound file references / credits #32
• Check that the json does point to an id and a variant that exist in game
• Make sure sound files are .ogg Change check to fail on sound file not ogg #49

If we could have all of this in one or several script that could be loade in a github action that would be very nice.