add workflow to update layers

Author: Torwent

.github/workflows/update-layers.yml

@@ -0,0 +1,49 @@
+name: Update layers with data from wasp-data
+
+on:
+  workflow_dispatch:
+
+jobs:
+  update-layers:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 1
+          sparse-checkout: |
+            # skip downloading data:
+            !map/
+            !heightmap/
+            !collision/
+
+      - name: Checkout Wasp-Data
+        uses: actions/checkout@v5
+        with:
+          repository: 'WaspScripts/wasp-data'
+          ref: 'main'
+          fetch-depth: 1
+          path: /tmp/wasp-data
+          sparse-checkout: |
+            map/map.zip
+            map/heightmap.zip
+            map/collision.zip
+
+      - name: Reset target directories
+        run: |
+          rm -rf ./map ./heightmap ./collision
+          mkdir -p ./map ./heightmap ./collision
+
+      - name: Unzip files
+        run: |
+          unzip -o /tmp/wasp-data/map/map.zip -d ./map
+          unzip -o /tmp/wasp-data/map/heightmap.zip -d ./heightmap
+          unzip -o /tmp/wasp-data/map/collision.zip -d ./collision
+
+      - name: Commit and push changes
+        run: |
+          git config --global user.name "Wasp Bot"
+          git config --global user.email "[email protected]"
+          git add ./map ./heightmap ./collision
+          git commit -m "Update layers from wasp-data" || echo "No changes to commit"
+          git push