fix: clippy suggestions

[DeveloperPaul123]

Changes:

• Applied almost all of clippy suggestions to the project. Last ones will be added in a subsequent PR.
• Added CI actions to check for clippy warnings and formatting

Elo   | 12.59 +- 8.30 (95%)
SPRT  | 8.0+0.08s Threads=1 Hash=16MB
LLR   | 3.08 (-2.94, 2.94) [0.00, 10.00]
Games | N: 2154 W: 386 L: 308 D: 1460
Penta | [21, 207, 559, 253, 37]
http://developerpaul123.pythonanywhere.com/test/27/

bench: 2577543