🧑‍💻 Improve env variables type safety and management (#718)

Closes #679

apps/builder/src/features/dashboard/api/getAppVersionProcedure.ts

@@ -1,5 +1,6 @@
 import { publicProcedure } from '@/helpers/server/trpc'
+import { env } from '@typebot.io/env'
 
 export const getAppVersionProcedure = publicProcedure.query(async () => {
-  return { commitSha: process.env.VERCEL_GIT_COMMIT_SHA }
+  return { commitSha: env.VERCEL_GIT_COMMIT_SHA }
 })