Add wp_query_abilities: flexible filtering for registered abilities

[prab18hat]

Closes #38.

[github-actions]

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Co-authored-by: prab18hat <prab18hat@git.wordpress.org>
Co-authored-by: gziolo <gziolo@git.wordpress.org>
Co-authored-by: galatanovidiu <ovidiu-galatan@git.wordpress.org>
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.66%. Comparing base (4beab25) to head (bb2f44c).
⚠️ Report is 22 commits behind head on trunk.

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk      #85      +/-   ##
============================================
+ Coverage     84.84%   92.66%   +7.81%     
============================================
  Files            16        7       -9     
  Lines           772      218     -554     
  Branches         86       85       -1     
============================================
- Hits            655      202     -453     
+ Misses          117       16     -101     

Flag	Coverage Δ
javascript	92.66% <ø> (ø)
unit	?

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[gziolo]

There are two much more advanced alternative implementations proposed by @galatanovidiu:

• Add Filtering Capabilities for Registered Abilities #115
• Add Filtering Capabilities for Registered Abilities using collections (POC) #119

@prab18hat, do you plan to continue working on your version? Would you like to share some feedback in #38 on which direction seems better from your perspective?