General refactor/restructure of project

[klaasnicolaas]

General restructure/refactor of the project.

• Updates all sub-dependencies
• Replace flake + all plugins + isort + pyupgrade + bandit by ruff
• Address all issues raised by ruff
• Simplify GitHub actions runs, to have a little fewer jobs/faster runtimes and leverage caching capabilities of other actions
• Remove old configs no longer in use

[codecov]

Codecov Report

Base: 95.80% // Head: 98.60% // Increases project coverage by +2.79% 🎉

Coverage data is based on head (d09ed4e) compared to base (67c80e0).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #303      +/-   ##
==========================================
+ Coverage   95.80%   98.60%   +2.79%     
==========================================
  Files           4        4              
  Lines         143      143              
  Branches       16       15       -1     
==========================================
+ Hits          137      141       +4     
+ Misses          3        1       -2     
+ Partials        3        1       -2     

Impacted Files	Coverage Δ
p1monitor/models.py	97.14% <100.00%> (+5.36%)	⬆️
p1monitor/p1monitor.py	100.00% <100.00%> (ø)

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