[3.x] Add "--xdebug" CLI option to enabled Xdebug

[ravage84]

Type: Feature Issue: Resolves None Breaking change: No

Inspired by https://dev.to/serendipityhq/how-to-debug-any-symfony-command-simply-passing-x-214o

This could easily be a feature of composer/xdebug-handler itself, if they would want to.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 5.26316% with 18 lines in your changes missing coverage. Please review.

Project coverage is 91.48%. Comparing base (5444160) to head (afa75e0).

Files	Patch %	Lines
src/main/php/PHPMD/TextUI/XdebugOptionHandler.php	0.00%	18 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##                3.x    #1158      +/-   ##
============================================
- Coverage     91.96%   91.48%   -0.49%     
- Complexity     1290     1296       +6     
============================================
  Files           107      108       +1     
  Lines          3398     3417      +19     
============================================
+ Hits           3125     3126       +1     
- Misses          273      291      +18     

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[AJenbo]

This could easily be a feature of composer/xdebug-handler itself, if they would want to.

Did you propose the change upstream?

[ravage84]

Did you propose the change upstream?

Not yet