ci: add release workflow for Android AAR and sample APK

Author: it5prasoon

.github/workflows/release.yml

@@ -0,0 +1,109 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'  # Triggers on tags like v0.1.0, v1.0.0
+  workflow_dispatch:  # Allow manual trigger
+    inputs:
+      version:
+        description: 'Version to release (e.g., 0.1.0)'
+        required: true
+        type: string
+
+jobs:
+  release:
+    name: Build and Release
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+          
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+          
+      - name: Setup Android SDK
+        uses: android-actions/setup-android@v3
+        
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+        
+      - name: Determine version
+        id: version
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            VERSION="${{ github.event.inputs.version }}"
+          else
+            VERSION="${GITHUB_REF#refs/tags/v}"
+          fi
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "Version: $VERSION"
+          
+      - name: Build Release AAR
+        run: ./gradlew :app:assembleRelease
+        
+      - name: Build Sample APK
+        run: ./gradlew :sample:assembleRelease
+        
+      - name: Create Release Notes
+        id: release_notes
+        run: |
+          cat << EOF > release_notes.md
+          ## LLaMA Kotlin Android v${{ steps.version.outputs.version }}
+          
+          ### Installation
+          
+          Add to your \`build.gradle.kts\`:
+          
+          \`\`\`kotlin
+          dependencies {
+              implementation("org.codeshipping:llama-kotlin-android:${{ steps.version.outputs.version }}")
+          }
+          \`\`\`
+          
+          ### Artifacts
+          
+          - **llama-kotlin-android-${{ steps.version.outputs.version }}.aar** - The main library
+          - **sample-release.apk** - Sample application demonstrating usage
+          
+          ### What's Included
+          
+          - Kotlin-first API for LLaMA inference
+          - Native llama.cpp backend
+          - Support for arm64-v8a and x86_64
+          - Coroutine-based streaming generation
+          
+          ### Maven Central
+          
+          This release is also available on [Maven Central](https://central.sonatype.com/artifact/org.codeshipping/llama-kotlin-android/${{ steps.version.outputs.version }})
+          EOF
+          
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v1
+        with:
+          name: v${{ steps.version.outputs.version }}
+          tag_name: v${{ steps.version.outputs.version }}
+          body_path: release_notes.md
+          draft: false
+          prerelease: false
+          files: |
+            app/build/outputs/aar/app-release.aar
+            sample/build/outputs/apk/release/sample-release-unsigned.apk
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          
+      - name: Summary
+        run: |
+          echo "### Release Created! 🎉" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Version:** v${{ steps.version.outputs.version }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "**Artifacts:**" >> $GITHUB_STEP_SUMMARY
+          echo "- Library AAR" >> $GITHUB_STEP_SUMMARY
+          echo "- Sample APK" >> $GITHUB_STEP_SUMMARY