Allow extensions to add their own data to debug output

[lkrms]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 45.94595% with 20 lines in your changes missing coverage. Please review.

Project coverage is 95.25%. Comparing base (57ed4de) to head (5111973).
Report is 4 commits behind head on main.

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/App/PrettyPHPCommand.php	39.28%	17 Missing ⚠️
src/Formatter.php	57.14%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #179      +/-   ##
============================================
- Coverage     95.48%   95.25%   -0.23%     
- Complexity     2710     2720      +10     
============================================
  Files            67       67              
  Lines          6843     6874      +31     
============================================
+ Hits           6534     6548      +14     
- Misses          309      326      +17     

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