sample: kotlinlang mcp server (#713)

add new sample: kotlinlang mcp server with 2 tools
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## How Has This Been Tested?
inspector/unit

## Breaking Changes
none

## Checklist
- [x] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [x] My code follows the repository's style guidelines
- [x] New and existing tests pass locally
- [x] I have added appropriate error handling
- [x] I have added or updated documentation as needed

samples/kotlinlang-mcp-server/Dockerfile

@@ -0,0 +1,14 @@
+FROM gradle:jdk21-alpine AS build
+WORKDIR /project
+COPY gradle/ gradle/
+COPY gradlew settings.gradle.kts build.gradle.kts ./
+COPY src/ src/
+RUN ./gradlew shadowJar --no-daemon
+
+FROM eclipse-temurin:21-jre-alpine
+RUN addgroup -S appgroup && adduser -S appuser -G appgroup
+WORKDIR /app
+COPY --from=build /project/build/libs/*-all.jar app.jar
+USER appuser
+EXPOSE 8080
+ENTRYPOINT ["java", "-jar", "app.jar"]