ci(finalize): initial pipeline for finalize

.github/workflows/build-finalize.yml

@@ -0,0 +1,32 @@
+name: Build finalize (3DS)
+
+on:
+  push:
+    paths:
+      - 'finalize/**'
+  pull_request:
+    paths:
+      - 'finalize/**'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    container:
+      image: devkitpro/devkitarm:20260219
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build finalize module
+        working-directory: finalize
+        run: make
+
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: finalize-3dsx
+          path: |
+            finalize/custom-install-finalize.3dsx
+            finalize/custom-install-finalize.elf
+            finalize/custom-install-finalize.smdh