feat: fullscreen image overlay for images block

[rofe]

Summary

• Adds show-original block option to the images block
• When present, images become clickable and open in a fullscreen overlay showing the original image (query params stripped)
• Overlay dismisses via close button (×), Escape key, or clicking the backdrop

Before: https://main--inside-aem--adobe.aem.page/en/drafts/blog/aem-blog-from-app-stores-to-aem-12-learnings-and-a-few-open-questions
After: https://images-show-original--inside-aem--adobe.aem.page/en/drafts/blog/aem-blog-from-app-stores-to-aem-12-learnings-and-a-few-open-questions

🤖 Generated with Claude Code

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Commits

• a5ca5eb ✅ (latest)
• 1425554 ✅

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	Page	Scores	Audits
📱	/en/drafts/blog/aem-blog-from-app-stores-to-aem-12-learnings-and-a-few-open-ques tions
🖥️	/en/drafts/blog/aem-blog-from-app-stores-to-aem-12-learnings-and-a-few-open-ques tions