build: use OAT to link my mod (#2)

.github/workflows/link-linux.yml

@@ -0,0 +1,27 @@
+name: link
+
+on: [push]
+
+jobs:
+  link-linux:
+    name: Link assets on Linux
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out files
+        uses: actions/checkout@main
+
+      - name: Setup OAT
+        uses: diamante0018/setup-oat@main
+        with:
+          version: "0.8.3"
+
+      - name: Link assets
+        run: |
+          Linker -v arena
+      - name: Upload mod.ff
+        uses: actions/upload-artifact@main
+        with:
+          name: arena
+          path: |
+            zone_out/arena/mod.ff