Php 8.4

[didoda]

This introduces php 8.4 in CI for phpcs, psalm and stan.
This is gonna be a patch, to include #57 to avoid deprecations on BEditaClientException.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (46e78c5) to head (1cb2906).
Report is 6 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master       #60   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
  Complexity       104       104           
===========================================
  Files              4         4           
  Lines            287       288    +1     
===========================================
+ Hits             287       288    +1     

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