Build new ai-helpers skills from gap analysis

[patternfly-jira-sync]

16 new skills identified during the [PF-4014 spike|https://redhat.atlassian.net/browse/PF-4014]. Covers migration, a11y, react, code-review, and pf-internal plugins.

Full evaluation on the [Miro board|https://miro.com/app/board/uXjVHWEd7Fw=/?moveToWidget=3458764671530792646&cot=14].

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Jira Issue: PF-4171

[coderabbitai]

🔗 Related PRs

#6 - feat(skills): add PatternFly 6 development skills for Claude Code [merged]
#26 - feat(skill): summarize jira issues & PR reviews [merged]
#29 - Add skill for writing unit tests for PatternFly ecosystem components [merged]
#48 - Add Jira quarterly-initiative-report skill to pf-workflow plugin [merged]
#62 - feat(ai-guidelines): skills framework [merged]

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