Added fixture updater and moved to File library.

[AlexSkrypnyk]

Closes #1562

Changed

1. Switched to https://github.com/AlexSkrypnyk/file for managing any file operations.
2. Removed tests and Fixtures for the file operations.
3. Updated Install fixtures to use the Diff format instead of full files.
4. Added support for updating fixtures when UPDATE_FIXTURES is set.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 55.36%. Comparing base (177de1b) to head (3c161d2).
Report is 1 commits behind head on develop.

Files with missing lines	Patch %	Lines
.vortex/installer/src/Utils/File.php	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1566      +/-   ##
===========================================
- Coverage    63.24%   55.36%   -7.88%     
===========================================
  Files           91       90       -1     
  Lines         5030     4673     -357     
===========================================
- Hits          3181     2587     -594     
- Misses        1849     2086     +237     

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