chore(cleanup): react-doctor dead code elimination, landing + docs ov… #16567

Job	Run time
Detect Version	4s
Test and Build / Test and Build	42s
Check Docs Changes	0s
Build Dev ECR	0s
Build ARM64 (GHCR Only)	0s
Migrate Dev DB	0s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	5m 18s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	57s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	44s
Process Docs	0s
Create GHCR Manifests	0s
Create GitHub Release	0s
	7m 45s

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