Add infro action

Closes #259

.github/workflows/infro.yaml

@@ -0,0 +1,26 @@
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  comment-diffs:
+    name: comment diffs
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - uses: infro-io/comment-diffs-action@08be5a9ac792e06ed87b26faaa52da44dd67ce42 # v1.4
+        with:
+          repo: ${{ github.repository }}
+          revision: ${{ github.sha }}
+          pull-number: ${{ github.event.number }}
+          config: |
+            deployers:
+              - type: argocd
+                name: my-argo-cluster
+                endpoint: argocd.hashbang.sh
+                authtoken: ${{ secrets.INFRO_ARGOCD_TOKEN }}
+            vcs:
+              type: github
+              authtoken: ${{ secrets.GITHUB_TOKEN }}

argocd/users.patch.yaml

@@ -15,3 +15,6 @@ data:
   accounts.lrvick: apiKey,login
   accounts.ryan: apiKey,login
   accounts.michael: apiKey,login
+
+  # bots
+  accounts.infro: apiKey # https://github.com/infro-io/infro-core?tab=readme-ov-file#argocd