fix: Ensure prettier is a LSG dev dependency

Author: rjmunro

packages/live-status-gateway-api/package.json

@@ -50,6 +50,7 @@
 		"@asyncapi/modelina": "^5.10.1",
 		"@asyncapi/nodejs-ws-template": "^0.10.0",
 		"@asyncapi/parser": "^3.6.0",
+		"prettier": "^3.8.3",
 		"yaml": "^2.8.3"
 	},
 	"prettier": "@sofie-automation/code-standard-preset/.prettierrc.json",

packages/yarn.lock

@@ -7080,6 +7080,7 @@ __metadata:
     "@asyncapi/modelina": "npm:^5.10.1"
     "@asyncapi/nodejs-ws-template": "npm:^0.10.0"
     "@asyncapi/parser": "npm:^3.6.0"
+    prettier: "npm:^3.8.3"
     tslib: "npm:^2.8.1"
     yaml: "npm:^2.8.3"
   languageName: unknown