Move generateLibVersion task to kotlin-sdk-core (#274)

fix #272 

## How Has This Been Tested?
Locally

## Breaking Changes
No

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## 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
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

kotlin-sdk-server/api/kotlin-sdk-server.api

@@ -1,7 +1,3 @@
-public final class io/modelcontextprotocol/kotlin/sdk/LibVersionKt {
-	public static final field LIB_VERSION Ljava/lang/String;
-}
-
 public final class io/modelcontextprotocol/kotlin/sdk/server/KtorServerKt {
 	public static final fun MCP (Lio/ktor/server/application/Application;Lkotlin/jvm/functions/Function1;)V
 	public static final fun mcp (Lio/ktor/server/application/Application;Lkotlin/jvm/functions/Function1;)V