Add GitHub Actions workflow to unpack files.zip

.github/workflows/unpack-zip.yml

@@ -0,0 +1,57 @@
+name: Unpack files.zip
+
+on:
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: 'Branch containing files.zip'
+        required: true
+        default: 'c2-integration'
+
+jobs:
+  unpack:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.inputs.branch }}
+          persist-credentials: true
+
+      - name: Ensure unzip available
+        run: sudo apt-get update -y && sudo apt-get install -y unzip rsync
+
+      - name: Verify files.zip exists
+        run: |
+          if [ ! -f files.zip ]; then
+            echo "ERROR: files.zip not found in repo root on branch ${{ github.event.inputs.branch }}"
+            exit 1
+          fi
+          echo "files.zip found:" && ls -lh files.zip
+
+      - name: Unpack files.zip
+        run: |
+          rm -rf extracted
+          mkdir -p extracted
+          unzip -o files.zip -d extracted
+          echo "Sample extracted files:"
+          find extracted -maxdepth 3 -type f | sed -n '1,200p'
+
+      - name: Copy extracted files into repository
+        run: |
+          rsync -a --exclude='.git' extracted/ .
+
+      - name: Commit and push changes (if any)
+        env:
+          BRANCH: ${{ github.event.inputs.branch }}
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add -A
+          if git diff --cached --quiet; then
+            echo "No changes to commit."
+          else
+            git commit -m "Unpack files.zip into branch ${BRANCH} via workflow"
+            git push origin "HEAD:${BRANCH}"
+            echo "Changes pushed."
+          fi