Add build workflow

.github/workflows/build.yml

@@ -0,0 +1,72 @@
+name: Build Library
+
+on:
+  workflow_dispatch:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[ci skip]')"
+    steps:
+    - uses: actions/checkout@v4
+    - uses: gradle/actions/wrapper-validation@v4
+
+    - name: Set up JDK 8
+      uses: actions/setup-java@v4
+      with:
+        distribution: "temurin"
+        java-version: 8
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Setup Android ndk r15c
+      run: |
+        sudo apt install libncurses5
+        wget https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip
+        unzip android-ndk-r15c-linux-x86_64.zip
+        echo "ndk.dir=$(realpath android-ndk-r15c)" > local.properties
+
+    - name: Setup gradle
+      uses: gradle/actions/setup-gradle@v4
+
+    - name: Build library
+      run: ./gradlew assembleRelease
+
+    - name: Set release environment variables
+      run: |
+        echo "AAR_SHA256=$(sha256sum imagefilters/build/outputs/aar/imagefilters-release.aar | awk '{ print $1 }')" >> $GITHUB_ENV
+
+    - name: Set lib version env variables
+      run: |
+        VERSION_NAME=$(grep -oP 'versionName\s*"\K[^"]+' imagefilters/build.gradle)
+        VERSION_CODE=$(grep -oP 'versionCode\s*\K\d+' imagefilters/build.gradle)
+        echo "VERSION_NAME=$VERSION_NAME" >> $GITHUB_ENV
+        echo "VERSION_CODE=$VERSION_CODE" >> $GITHUB_ENV
+
+    - name: Upload binaries to a release
+      id: release
+      uses: softprops/action-gh-release@v2
+      with:
+        files: |
+          imagefilters/build/outputs/aar/imagefilters-release.aar
+        tag_name: "v${{ env.VERSION_NAME }}-${{ env.VERSION_CODE }}"
+
+    - name: Edit release body
+      run: |
+        BODY=$(cat <<EOF
+        ### Changes
+        $(git log --pretty=format:"- %s (@%an)" $(git describe --tags --abbrev=0 `git rev-list --tags --skip=1 --max-count=1 $TAG_NAME`)..$TAG_NAME -- . ':!.github' ':!.github/**' ':!.gitignore' ':!README.md' ':!LICENSE')
+        
+        ### SHA-256 Checksum of AAR
+        \`$AAR_SHA256\`
+        EOF
+        )
+        json_payload=$(jq -n --arg body "$BODY" '{body: $body}')
+        curl -L -X PATCH -H "Accept: application/vnd.github+json" -H "Authorization: Bearer $GITHUB_TOKEN" -H "X-GitHub-Api-Version: 2022-11-28" https://api.github.com/repos/$REPO/releases/$RELEASE_ID -d "$json_payload"
+      env:
+        TAG_NAME: "v${{ env.VERSION_NAME }}-${{ env.VERSION_CODE }}"
+        AAR_SHA256: ${{ env.AAR_SHA256 }}
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        REPO: ${{ github.repository }}
+        RELEASE_ID: ${{ steps.release.outputs.id }}