ci: add aireceipts pr-check (notice-only cost receipt)

Author: anandgupta42

.github/workflows/aireceipts.yml

@@ -0,0 +1,12 @@
+name: aireceipts
+on: [pull_request]
+permissions:
+  contents: read
+  pull-requests: write
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - run: npx -y aireceipts-cli@latest pr-check
+        env:
+          GH_TOKEN: ${{ github.token }}