Fix some ruff errors and simplify LICHESS_TYPE

[AttackingOrDefending]

Type of pull request:

• Bug fix
• Feature
• Other

Description:

Fixes some ruff errors and removes them from being ignored. I'm not sure if some changes (like removing else after return) are beneficial, so I'm open to reverting them back.

Also, makes Lichess in test_bot.lichess inherit from lib.lichess.Lichess to simplify away the LICHESS_TYPE variable.

Related Issues:

None.

Checklist:

• I have read and followed the contribution guidelines.
• I have added necessary documentation (if applicable).
• The changes pass all existing tests.

Screenshots/logs (if applicable):

[MarkZH]

Why is this renamed?

[AttackingOrDefending]

Because of the error "A004" # Import is shadowing a Python builtin. Python has a ConnectionError itself which can be used without being imported, so by importing the new error from requests we overrode it.