Remove unnecessary features to decrease maintenance/complexity overhead. + Cleanup & more repo usage.

[cmyui]

Describe your changes

This PR removes a couple of features:

• Support for unix sockets and related checks
• Insurance that the running python version is (>=3.11)
• Support for deprecated SERVER_ADDR and SERVER_PORT config vars - now only APP_x variants exist
• Exception hooks to catch some cases and display them in more simple light
• Validations to INET addresses
• Debugging hooks under _testing.runtime
• CLI handling using argparse for main.py (was only used for ./main.py -V)

All of these seem like unnecessary complexity requiring extra maintenance overhead with low value delivered.

It also migrates more direct queries to SQL to instead use players_repo, removes usage of __all__ in modules, and more general cleanup.

Related Issues / Projects

Checklist

• [x] I've manually tested my code

[cmyui]

This is a terrible PR in terms of atomicity -- sorry for that -- but hopefully high value. Moving fast today.

[TheFantasticLoki]

My only gripe is the no internet check, can be very useful in certain situations. otherwise good PR

[cmyui]

My only gripe is the no internet check, can be very useful in certain situations. otherwise good PR

👍🏻 I've re-added it