feat(billing): add appliesTo plan restriction for coupon codes (#3744) #12455

Job	Run time
Detect Version	6s
Test and Build / Test and Build	3m 46s
Check Docs Changes	0s
Build AMD64 (./docker/realtime.Dockerfile, ghcr.io/simstudioai/realtime, ECR_REALTIME)	4m 16s
Build AMD64 (./docker/db.Dockerfile, ghcr.io/simstudioai/migrations, ECR_MIGRATIONS)	1m 44s
Build AMD64 (./docker/app.Dockerfile, ghcr.io/simstudioai/simstudio, ECR_APP)	5m 41s
Build ARM64 (GHCR Only)	-1s
Create GHCR Manifests	-1s
Process Docs	-1s
Create GitHub Release	0s
	15m 30s

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