Setup GitHub actions?

.github/workflows/sktemu_release.yml

@@ -0,0 +1,29 @@
+name: Build SKTemu Release
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+          cache: maven
+      - name: Build with Maven
+        run: mvn -B package --file pom.xml
+      - name: Update dependency graph
+        uses: advanced-security/maven-dependency-submission-action@571e99aab1055c2e71a1e2309b9691de18d6b7d6
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: SKTemu
+          path: 'target/sktemu-*.jar'