feat: add opt-in logical keyframes and animation references

[oe]

Logical keyframes currently remain uncompiled, so physical-property fallback styles cannot animate those properties in older browsers. Add animations: true to generate distinct LTR and RTL copies of referenced logical keyframes and rewrite static animation-name and animation shorthand references. The option defaults to false; existing default behavior and other options remain unchanged.

Parse shorthand roles before selecting animation names, including scientific-notation durations, negative delays, keyword names, quoted/escaped names and multiple animations. Avoid naming collisions, preserve original definitions, clone every same-name definition in its original conditional context, support prefixed declarations/definitions, and preserve shorthand/longhand resets and importance. Reprocessing serialized output is idempotent. Dynamic references remain unchanged with a warning; inline imports and expand nesting before this plugin.

Add a runnable direction-toggle example, README/API/configuration documentation and packed-consumer checks for the new option. Allow CI for stacked PR bases while keeping documentation deployment restricted to main.

This change builds on #2, which was merged first. It adds no third-party runtime dependency and contains independently written code. Released in v0.7.1.

Validation:

• 453 tests pass, including 24 animation cases and 23 transition-property cases.
• 162 browser cascade comparisons, 32 real transition timing comparisons and 26 native/compiled animation intermediate-frame comparisons pass.
• The runnable example switches active keyframes between LTR and RTL.
• Types, library/documentation builds and packed CommonJS/ES module/TypeScript consumers pass.

Release review also verifies literal backslashes do not alias hexadecimal escapes in quoted animation names. Packed consumers pass on Node.js 20.19.0 and 22.

[codecov]

Codecov Report

❌ Patch coverage is 98.91304% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 98.22%. Comparing base (d90017c) to head (3731fc6).
⚠️ Report is 11 commits behind head on main.

Files with missing lines	Patch %	Lines
src/animations.ts	98.82%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #3      +/-   ##
==========================================
+ Coverage   98.06%   98.22%   +0.16%     
==========================================
  Files           7        8       +1     
  Lines         722      900     +178     
  Branches      220      305      +85     
==========================================
+ Hits          708      884     +176     
- Misses         14       16       +2     

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