Cakephp 5 (+ php 8.4, phpunit 11)

[didoda]

This updates dependencies and codebase to use cakephp 5.

Main dependencies updates:

• "cakephp/cakephp": from "^4.5" to "^5.0"
• "cakephp/twig-view": from "^1.3.0" to "^2"

Dev dependencies updates:

• "cakephp/authentication": from "^2.9" to "^3.0.3"
• "cakephp/authorization": from "^2.2" to "^3.1.2"
• "cakephp/cakephp-codesniffer": from "^4.7" to "^5.0"
• "phpstan/extension-installer": from "^1.2" to "^1.4"
• "phpstan/phpstan": from "^1.10" to "^1.12"
• "phpunit/phpunit": from "^9.6" to "^11.1.3"

New dev dependencies:

• "phpstan/phpstan-phpunit": "^1.4"

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d05d392) to head (9c99d8f).
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #104   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
+ Complexity       277       276    -1     
===========================================
  Files             28        28           
  Lines            870       876    +6     
===========================================
+ Hits             870       876    +6     

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