Add CI

.github/workflows/ci.yml

@@ -0,0 +1,30 @@
+name: CI
+on:
+  push:
+    branches:
+      - main
+      - next
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    types: [opened, reopened, synchronize]
+    paths-ignore:
+      - '**.md'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+      - name: Validate Gradle wrapper
+        uses: gradle/actions/wrapper-validation@v3
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+      - name: Assemble
+        run: ./gradlew assembleRelease