add collapsible-card block

[jrrings]

Describe your specific features or fixes

Resolves: MWPW-143341

Test URLs:

• Pre Migration Link: https://adobe.com/express/create/advertisement/facebook
• Before: https://main--express-milo--adobecom.hlx.page/express/create/advertisement/facebook
• After: https://MWPW-143341--express-milo--adobecom.hlx.page/express/create/advertisement/facebook

Additional Test URLs:

• https://MWPW-143341--express-milo--adobecom.hlx.page/express/create/banner/linkedin
• https://MWPW-143341--express-milo--adobecom.hlx.page/nl/express/create/meme

[aem-code-sync]

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Commits

• 9901ba7 ✅ (latest)
• cd975c2 ✅

[aem-code-sync]

	Page	Scores	Audits
📱	/express/create/advertisement/facebook
🖥️	/express/create/advertisement/facebook
📱	/express/create/banner/linkedin
🖥️	/express/create/banner/linkedin
📱	/nl/express/create/meme
🖥️	/nl/express/create/meme

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 95.71429% with 3 lines in your changes missing coverage. Please review.

Project coverage is 64.87%. Comparing base (51241ff) to head (9901ba7).
Report is 15 commits behind head on main.

Files with missing lines	Patch %	Lines
...xpress/blocks/collapsible-card/collapsible-card.js	95.71%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #67      +/-   ##
==========================================
- Coverage   64.94%   64.87%   -0.08%     
==========================================
  Files          38       43       +5     
  Lines        5611     6499     +888     
==========================================
+ Hits         3644     4216     +572     
- Misses       1967     2283     +316     

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[vhargrave]

Looking really good. Just found one small code thing, and once you've done that you can go ahead and merge imo.