Force LTR for ability schema JSON viewer

[t-hamano]

Part of #483

What?

Force LTR direction on the ability schema JSON viewer in the Abilities Explorer.

Why?

JSON output is structurally LTR and should not be flipped when the admin language is RTL.

How?

Add direction: ltr; to .ability-schema-display with an /*rtl:ignore*/ directive so RTLCSS preserves it in the generated -rtl.css.

Use of AI Tools

AI assistance: Yes
Tool(s): Claude Code
Model(s): Claude Opus 4.7
Used for: Diagnosing the malformed rtl:ignore comment and applying the fix.

Testing Instructions

1. Switch the WP admin to an RTL language (e.g. Arabic).
2. Open Abilities Explorer and view an ability's schema.
3. Confirm the JSON renders left-to-right.

Before	After

Changelog Entry

Fixed - Ability schema JSON viewer now stays LTR under RTL admin languages.

[github-actions]

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Co-authored-by: t-hamano <wildworks@git.wordpress.org>

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.06%. Comparing base (a44e792) to head (554db2d).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #485   +/-   ##
==========================================
  Coverage      69.06%   69.06%           
  Complexity       957      957           
==========================================
  Files             60       60           
  Lines           4512     4512           
==========================================
  Hits            3116     3116           
  Misses          1396     1396           

Flag	Coverage Δ
unit	69.06% <ø> (ø)

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