ci: add Codeball (#6997)

[skip ci]

.github/workflows/codeball.yml

@@ -0,0 +1,35 @@
+# Docs: https://github.com/sturdy-dev/codeball-action
+name: Codeball
+on: [ pull_request ]
+
+permissions:
+  contents: read
+  issues: write
+  pull-requests: write
+
+jobs:
+  codeball:
+    runs-on: ubuntu-latest
+    name: Codeball
+    steps:
+
+      # Start a new Codeball review job
+      # This step is asynchronous and will return a job id
+      - name: Trigger Codeball
+        id: codeball_baller
+        uses: sturdy-dev/codeball-action/baller@v2
+
+
+      # Wait for Codeball to return the status
+      - name: Get Status
+        id: codeball_status
+        uses: sturdy-dev/codeball-action/status@v2
+        with:
+          codeball-job-id: ${{ steps.codeball_baller.outputs.codeball-job-id }}
+
+      # If Codeball approved the contribution, approve the PR
+      - name: Approve PR
+        uses: sturdy-dev/codeball-action/approver@v2
+        if: ${{ steps.codeball_status.outputs.approved == 'true' }}
+        with:
+          message: "Codeball: LGTM! :+1:"