Add API doc website generation

Signed-off-by: Arthit Suriyawongkul <[email protected]>

Author: bact

.github/workflows/docs.yml

@@ -0,0 +1,33 @@
+name: Generate and publish API JavaDocs
+on:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+
+jobs:
+  docs:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - uses: actions/setup-java@v4
+      with:
+        distribution: 'temurin'
+        java-version: 11
+    - name: Cache Maven packages
+      uses: actions/cache@v4
+      with:
+        path: ~/.m2
+        key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+
+    - name: Generate docs
+      run: mvn javadoc:javadoc
+
+    - name: Deploy docs
+      uses: peaceiris/actions-gh-pages@v4
+      with:
+        github_token: ${{ secrets.GITHUB_TOKEN }}
+        publish_dir: ./target/reports/apidocs