clean variables, split workflow in to actions

.gitea/workflows/actions/pull-lfs/action.yml

@@ -0,0 +1,35 @@
+name: "Pull Git LFS Objects"
+description: "Pull only LFS objects for changed skins and core assets"
+
+inputs:
+  changed_skins_file:
+    description: "Path to file containing changed skins"
+    required: false
+    default: ""
+
+runs:
+  using: "composite"
+  steps:
+    - name: Pull Git LFS objects
+      shell: bash
+      run: |
+        if [ -z "${{ inputs.changed_skins_file }}" ] || [ ! -s "${{ inputs.changed_skins_file }}" ]; then
+          echo "No skins changed. Skipping git pull lfs."
+          exit 0
+        fi
+
+        includes="src/**,export/**,media/**"
+
+        skin_includes=$(
+          while IFS= read -r skin; do
+            esc=$(printf '%s' "$skin" \
+              | sed -e 's/\[/\\[/g' -e 's/\]/\\]/g')
+            printf 'Skins/%s/**\n' "$esc"
+          done < "${{ inputs.changed_skins_file }}" \
+          | paste -sd ','
+        )
+
+        includes="$includes,$skin_includes"
+
+        echo "→ Pulling LFS objects for patterns: $includes"
+        git lfs pull --include="$includes"