ci: Add workflow to check each commit

.github/workflows/each.yaml

@@ -0,0 +1,38 @@
+# Helper workflow to trigger rcc for each commit on a branch
+
+on:
+  push:
+    branches:
+      - each-*
+
+name: rcc
+
+jobs:
+  rcc-smoke:
+    runs-on: ubuntu-24.04
+    outputs:
+      sha: ${{ steps.commit.outputs.sha }}
+      versions-matrix: ${{ steps.versions-matrix.outputs.matrix }}
+      dep-suggests-matrix: ${{ steps.dep-suggests-matrix.outputs.matrix }}
+
+    name: "Trigger rcc workflow for each commit"
+
+    # Begin custom: services
+    # End custom: services
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ inputs.ref }}
+          fetch-depth: 0
+
+      - name: Enumerate all commits from the repository's main branch
+        run: |
+          git remote -v
+          git fetch --all
+          # Get name of main branch of repository
+          # origin/HEAD isn't known here
+          main=$(git remote show origin | grep 'HEAD branch' | cut -d' ' -f5)
+          commits=$(git log --pretty=format:"%H" ${main}..HEAD --)
+          echo $commits
+        shell: bash