feat(phase-22c): cinematic marketing page (centerpiece) #169

Job	Run time
Shellcheck	14s
Built-bundle secret scan	27s
Build (ubuntu-latest)	43s
PowerShell parse + lint	45s
Build (macos-latest)	52s
Content lint	20s
Build (windows-latest)	2m 13s
Test (ubuntu-latest)	36s
Line-endings (Windows checkout)	25s
Test (macos-latest)	1m 11s
Test (windows-latest)	2m 8s
Cloud-init drift warning	0s
Verify golden solutions	22s
	10m 16s

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