Add mod build workflow

Author: object-Object

.github/workflows/mod.yml

@@ -0,0 +1,32 @@
+name: Build mlogv32-utils
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+
+      - uses: gradle/actions/setup-gradle@v4
+
+      - name: Build mod
+        working-directory: mod
+        run: ./gradlew build
+      
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build
+          path: mod/build/libs/*-mod.jar
+          if-no-files-found: error