Add searching for XHProf local files

[roxblnfk]

What was changed

Added FileObserver that can find xhprof files in a directory configured in php.ini

Add envs:

• TRAP_XHPROF_SORT
• TRAP_XHPROF_PATH

Difference between algorithms:

`TRAP_XHPROF_SORT=0`  `TRAP_XHPROF_SORT=1`  `TRAP_XHPROF_SORT=2`  `TRAP_XHPROF_SORT=3` 

Checklist

• Fix #52, part of #43
• Tested
  • [x] Tested manually
  • [ ] Unit tests added
• [ ] Documentation

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 2.64706% with 331 lines in your changes are missing coverage. Please review.

Project coverage is 22.81%. Comparing base (3aedbe7) to head (fd1889c).

Files	Patch %	Lines
src/Service/FilesObserver/Converter/XHProf.php	0.00%	74 Missing :warning:
src/Service/FilesObserver/Converter/Tree.php	0.00%	45 Missing :warning:
src/Service/FilesObserver/Converter/Cost.php	0.00%	38 Missing :warning:
src/Service/FilesObserver/Handler.php	0.00%	33 Missing :warning:
src/Service/FilesObserver/FileInfo.php	0.00%	25 Missing :warning:
src/Service/FilesObserver.php	0.00%	23 Missing :warning:
src/Proto/Frame/Profiler/Payload.php	0.00%	20 Missing :warning:
src/Sender/Console/Renderer/Profiler.php	0.00%	12 Missing :warning:
src/Application.php	0.00%	10 Missing :warning:
src/Service/FilesObserver/Converter/Edge.php	0.00%	8 Missing :warning:
... and 13 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #111 +/- ## ============================================ - Coverage 24.81% 22.81% -2.01% - Complexity 1136 1232 +96 ============================================ Files 132 146 +14 Lines 3469 3791 +322 ============================================ + Hits 861 865 +4 - Misses 2608 2926 +318 ```

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