Enhance pf-import-check with bundle-size detection

[patternfly-jira-sync]

Extend the existing pf-import-check skill to detect bundle-size anti-patterns in addition to import correctness. PF bundle bloat is almost entirely caused by import patterns — barrel imports from @patternfly/react-icons (1.8MB per SSR chunk), full patternfly.css instead of per-component CSS, and icon tree-shaking failures.

AC:

• pf-import-check detects barrel imports from @patternfly/react-icons and suggests deep imports

• Detects full patternfly.css imports and suggests per-component CSS alternatives

• Detects duplicate PF module imports that inflate bundle

• Existing import correctness checks continue to work unchanged

• Eval updated to cover new bundle-size detection cases

**Eval requirement: **Create a corresponding eval issue (Eval: pf-{skill-name}), link it to this story, and the eval must pass before the skill can be marked Done.

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Jira Issue: PF-4485

[coderabbitai]

🔗 Related PRs

#6 - feat(skills): add PatternFly 6 development skills for Claude Code [merged]
#29 - Add skill for writing unit tests for PatternFly ecosystem components [merged]
#108 - feat(skill): pf design token check skill [merged]
#131 - feat(PF-4363): add pf-assist agent and eval [merged]
#133 - feat(PF-4339,PF-4346,PF-4343): add scanner skill evals [merged]

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