ci: add workflow to deploy migrations to staging

.github/workflows/stage.yml

@@ -0,0 +1,27 @@
+name: Deploy Migrations to Staging
+
+on:
+    push:
+        branches:
+            - develop
+    workflow_dispatch:
+
+jobs:
+    deploy:
+        runs-on: ubuntu-latest
+        environment: stage
+
+        env:
+            SUPABASE_ACCESS_TOKEN: ${{ secrets.SUPABASE_ACCESS_TOKEN }}
+            SUPABASE_DB_PASSWORD: ${{ secrets.STAGING_DB_PASSWORD }}
+            SUPABASE_PROJECT_ID: ${{ secrets.STAGING_PROJECT_ID }}
+
+        steps:
+            - uses: actions/checkout@v3
+
+            - uses: supabase/setup-cli@v1
+              with:
+                  version: latest
+
+            - run: supabase link --project-ref $SUPABASE_PROJECT_ID
+            - run: supabase db push