Fix Offset not found PHPStan error in Image class

[jwhulette]

This pull request makes small improvements to type safety in the Image.php file by adding more precise type annotations for regular expression match results. These changes help clarify the expected structure of the $matches array and can assist with static analysis tools.

• Type annotations for regex match results:
  • Added a PHPDoc type annotation for the $matches array in the constructor to specify it contains two string elements.
  • Added a PHPDoc type annotation for the $matches array in the focalPoint method to specify it contains four string elements.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.39%. Comparing base (36e088c) to head (5c7cae2).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #11   +/-   ##
=========================================
  Coverage     99.39%   99.39%           
  Complexity       54       54           
=========================================
  Files             1        1           
  Lines           165      165           
=========================================
  Hits            164      164           
  Misses            1        1           

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