Add Composer Require Checker and Rector

[arogachev]

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

[what-the-diff]

PR Summary

• Inclusion of Workflow Files
  Two new workflow files have been added; composer-require-checker.yml and rector.yml. These files are used by GitHub to automate tasks like building, testing, and deploying applications.

• Addition of new Composer Packages
  We have integrated two new composer packages; maglnet/composer-require-checker and rector/rector, to our project. These packages will improve the project's quality and maintenance. The maglnet/composer-require-checker helps in validating that no unused composer dependencies are present, and rector/rector aids in automated code refactoring.

• Inclusion of Rector Configuration File
  A rector.php file has also been incorporated. This file serves as the configuration file for Rector, defining the rules for code refactoring.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (22cd74f) to head (dea4364).
Report is 4 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##              master      #101   +/-   ##
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  Coverage     100.00%   100.00%           
  Complexity       100       100           
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  Files              6         6           
  Lines            292       292           
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  Hits             292       292           

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