feat: Add Kotlin SDK for MCP Apps

Kotlin SDK for hosting MCP Apps in Android applications:

SDK (kotlin/):
- AppBridge: Host-side protocol handler
- Transport abstraction (McpAppsTransport interface)
- Generated types from schema.json
- Full MCP Apps protocol support

Example App (examples/basic-host-kotlin/):
- Jetpack Compose app demonstrating SDK usage
- Bottom toolbar UI (server/tool pickers)
- WebViewTransport for Android WebView
- Tool forwarding to MCP servers
- Server name displayed in tool call cards
- Toast notifications for messages/logs

Type Generator:
- scripts/generate-kotlin-types.ts
- Generates Kotlin data classes from JSON Schema

CI:
- Kotlin job with JDK 21 on ubuntu-latest
- Builds and tests SDK

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: ochafik

.github/workflows/ci.yml

@@ -36,3 +36,37 @@ jobs:
       - run: npm test
 
       - run: npm run prettier
+
+  swift:
+    runs-on: macos-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build Swift SDK
+        working-directory: swift
+        run: swift build
+
+      - name: Test Swift SDK
+        working-directory: swift
+        run: swift test
+
+  kotlin:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: "21"
+          distribution: "temurin"
+
+      - name: Build Kotlin SDK
+        working-directory: kotlin
+        run: |
+          chmod +x gradlew
+          ./gradlew build
+
+      - name: Test Kotlin SDK
+        working-directory: kotlin
+        run: ./gradlew test

.prettierignore

@@ -4,3 +4,13 @@ examples/basic-server-react/**/*.ts
 examples/basic-server-react/**/*.tsx
 examples/basic-server-vanillajs/**/*.ts
 examples/basic-server-vanillajs/**/*.tsx
+
+# Swift package manager build artifacts
+sdk/swift/.build/
+examples/basic-host-swift/.build/
+examples/basic-host-swift/build/
+examples/basic-host-kotlin/.gradle/
+examples/basic-host-kotlin/build/
+
+# Swift build artifacts
+swift/.build/