Add CI workflows

Author: ynojima

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+  - package-ecosystem: gradle
+    directory: "/"
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: daily

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    tags:
+      - '*'
+    branches:
+      - '*'
+  schedule:
+    # everyday 10AM (UTC)
+    - cron: '0 10 * * *'
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java_version: [17]
+        os: [windows-latest]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java_version }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java_version }}
+          cache: 'gradle'
+
+      - name: Build with Gradle
+        run: ./gradlew build javadoc asciidoc
+
+  matrix-test:
+    name: Test on java ${{ matrix.java_version }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java_version: [17]
+        os: [windows-latest] # , macOS-latest (remove macOS as it is not stable for now) , ubuntu-latest (remove Ubuntu as Chrome 77 doesn't work
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java_version }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java_version }}
+          cache: 'gradle'
+
+      - name: Build with Gradle
+        run: ./gradlew check

.github/workflows/pr-gate-ci.yml

@@ -0,0 +1,67 @@
+name: Pull Request Gate CI
+
+on: pull_request
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    name: Build
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java_version: [17]
+        os: [windows-latest]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java_version }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java_version }}
+          cache: 'gradle'
+
+      - name: Build with Gradle
+        run: ./gradlew build javadoc asciidoc
+
+  matrix-test:
+    name: Test on java ${{ matrix.java_version }} and ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        java_version: [17]
+        os: [windows-latest] # , macOS-latest (remove macOS as it is not stable for now)
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK ${{ matrix.java_version }}
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: ${{ matrix.java_version }}
+          cache: 'gradle'
+
+      - name: Build with Gradle
+        run: ./gradlew check
+
+  auto-merge:
+    name: Auto Merge
+    runs-on: ubuntu-latest
+    if: ${{ github.actor == 'dependabot[bot]' }}
+    permissions:
+      contents: write
+      pull-requests: write
+    env:
+      GH_TOKEN: ${{ github.token }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Merge
+        run: gh pr merge "${GITHUB_HEAD_REF}" --merge --auto