- Implement liquid_blank? and liquid_empty? methods in Condition
to emulate ActiveSupport's behavior when it's not loaded
- This ensures templates like `{% if x == blank %}` work identically
whether ActiveSupport is loaded or not
- Update liquid-spec adapters for new API (ctx parameter)
- Add rake spec task for running liquid-spec matrix
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Co-Authored-By: Claude Opus 4.5 <[email protected]>