Feature: Nex Experiment Abilities Toggle

[hbhalodia]

What?

Closes #863

Why?

How?

Use of AI Tools

• Yes, Cluade Code, Opus 5.
• Used for inital implementation related to gating abilities and adding a custom ability experiment.
• Optimization and structuring related changes.
• Implementation was reviewed by me.

Testing Instructions

Screenshots or screencast

Before	After

Changelog Entry

Added - New feature.
Changed - Existing functionality.
Deprecated - Soon-to-be removed feature.
Removed - Feature.
Fixed - Bug fix.
Security - Vulnerability.
Developer - Development related updates.

[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 75 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.39%. Comparing base (5599e9d) to head (9824a43).

Files with missing lines	Patch %	Lines
includes/Abilities/Gated/Gated_Abilities.php	0.00%	30 Missing ⚠️
includes/Abilities/Utilities/Posts.php	80.00%	11 Missing ⚠️
.../Experiments/Custom_Abilities/Custom_Abilities.php	42.10%	11 Missing ⚠️
includes/Abilities/Gated/Read_Content.php	0.00%	6 Missing ⚠️
includes/Abilities/Gated/Read_Settings.php	0.00%	6 Missing ⚠️
includes/Abilities/Gated/Post_Utilities.php	0.00%	4 Missing ⚠️
includes/Abilities/Gated/Read_Users.php	0.00%	4 Missing ⚠️
includes/Abstracts/Abstract_Gated_Ability.php	0.00%	2 Missing ⚠️
includes/helpers.php	95.83%	1 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop     #881      +/-   ##
=============================================
- Coverage      80.43%   79.39%   -1.05%     
- Complexity      2565     2588      +23     
=============================================
  Files            110      117       +7     
  Lines          10448    10515      +67     
=============================================
- Hits            8404     8348      -56     
- Misses          2044     2167     +123     

Flag	Coverage Δ
unit	79.39% <50.00%> (-1.05%)	⬇️

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