Fix race condition: website build waits for blueprints schema

The website vite build was sometimes starting before the blueprints
schema validator file was fully generated, causing intermittent CI
failures with 'invalid JS syntax' errors. Adding an explicit dependency
ensures the schema generation completes first.

Author: adamziel

packages/playground/website/project.json

@@ -45,7 +45,10 @@
 					"logLevel": "info"
 				}
 			},
-			"dependsOn": ["^build"]
+			"dependsOn": [
+				"^build",
+				"playground-blueprints:build:blueprint-schema"
+			]
 		},
 		"dev": {
 			"executor": "nx:run-commands",