[MWPW-199007] - Enhance rich-content video/image block for W3

[DKos95]

Add authorable glass-border frame styling, responsive sizing, fixes for image assets, and mobile height constraints.

Resolves: MWPW-199007

Image Test URLs:

• Before: https://main--da-cc--adobecom.aem.page/cc-shared/fragments/tests/2026/q3/ace1209/fragments/cpro-product?milolibs=site-redesign-foundation&mep=%2Fcc-shared%2Ffragments%2Ftests%2F2026%2Fq3%2Face1209%2Face1209-cpro-redesign.json--all
• After: https://main--da-cc--adobecom.aem.page/cc-shared/fragments/tests/2026/q3/ace1209/fragments/cpro-product?milolibs=rc-w3-enhancement&mep=%2Fcc-shared%2Ffragments%2Ftests%2F2026%2Fq3%2Face1209%2Face1209-cpro-redesign.json--all

Video Test URLs:

• Before: https://main--da-cc--adobecom.aem.page/drafts/dusan/w3-rc-video-test?milolibs=site-redesign-foundation&mep=%2Fcc-shared%2Ffragments%2Ftests%2F2026%2Fq3%2Face1209%2Face1209-cpro-redesign.json--all
• After: https://main--da-cc--adobecom.aem.page/drafts/dusan/w3-rc-video-test?milolibs=rc-w3-enhancement&mep=%2Fcc-shared%2Ffragments%2Ftests%2F2026%2Fq3%2Face1209%2Face1209-cpro-redesign.json--all

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Commits

• 56b111d ✅ (latest)
• cbbf499 ✅
• ec06274 ✅
• 8fc0f39 ✅
• e163d34 ✅
• de012d4 ✅
• 0da7eec ✅