[WIP] Add hero card polymiddleware infrastructure #3274

Job	Run time
Build samples	30s
Verify build-browser (windows-latest)	2m 22s
Print commit stats	1m 2s
Verify build-browser (ubuntu-latest)	52s
Build	3m 55s
Verify build-browser (macos-26)	49s
Merge test snapshots	5s
Merge test results	4s
Unit test	0s
HTML test (${{ format('{0}/{1}', matrix.shard-index, matrix.shard-count) }})	0s
Static code analysis	0s
Type definitions test	0s
	9m 39s

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