Add detailed error messages for missing environment variables

The commit adds detailed error messages for missing environment variables across different configuration files. It updates the zod schema validations in different files, such as feature-flags.config.ts, personal-accounts-server-actions.ts, and others to provide more informative error messages when environment variables are not provided.

.github/workflows/workflow.yml

@@ -9,6 +9,12 @@ jobs:
     name: ʦ TypeScript
     timeout-minutes: 8
     runs-on: ubuntu-latest
+    env:
+      SUPABASE_SERVICE_ROLE_KEY: ${{ secrets.SUPABASE_SERVICE_ROLE_KEY }}
+      SUPABASE_DB_WEBHOOK_SECRET: ${{ secrets.SUPABASE_DB_WEBHOOK_SECRET }}
+      STRIPE_SECRET_KEY: ${{ secrets.STRIPE_SECRET_KEY }}
+      STRIPE_WEBHOOK_SECRET: ${{ secrets.STRIPE_WEBHOOK_SECRET }}
+
     steps:
       - uses: actions/checkout@v4
         with: