Allow to use option "config-plugin-file" in packages + Refactoring

[vjik]

Q	A
Is bugfix?	❌
New feature?	✔️
Breaks BC?	❌

[what-the-diff]

PR Summary

• Introduction of Configurable Packages
  A new feature has been added which allows the use of a "config-plugin-file" option in packages. This means you can now customize different packages according to your unique needs.

• Code Refactoring of Config Settings Reader
  The process of reading config settings has been improved. This was achieved by extracting the config settings reader to a separate class, leading to a more organized and maintainable codebase.

• Renaming of Root Configuration
  The ‘RootConfiguration’ class is now referred to as ‘ConfigSettings’. This provides a more accurate representation of the class’s functionality in the system.

• Enhancements to Test Cases
  A new test case has been introduced that checks the package configuration with a config file. This ensures that the packaging system works smoothly and robustly, as expected. The test case has been updated to verify correct values from the config file, making our testing process more robust and reducing the possibility of any issues going unnoticed.

• Addition of Configuration Files for Testing
  Along with the new test case, two new configuration files (params.php and web.php) have been added for the testing package. This gives us a wider range of scenarios to test and thus ensure the system's reliability.

• Cleaning Up Unused Functions
  To make the code leaner and more efficient, unused functions in the ProcessHelper class have been removed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (7a80d5e) to head (6218ed5).

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #173   +/-   ##
===========================================
  Coverage     100.00%   100.00%           
+ Complexity       283       281    -2     
===========================================
  Files             23        23           
  Lines            738       728   -10     
===========================================
- Hits             738       728   -10     

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