Relocate WebSocketIntegrationTest from commonTest to jvmTest (#352)

With Ktor 3.2.3, tests don’t work correctly with wasm, so the websocket
tests were moved to the jvm target as the most important one

## How Has This Been Tested?
local 

## Breaking Changes
None

## Types of changes
- [ ] 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
- [x] Refactoring

## 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

Author: devcrocod

kotlin-sdk-test/src/commonTest/kotlin/io/modelcontextprotocol/kotlin/sdk/integration/WebSocketIntegrationTest.kt renamed to kotlin-sdk-test/src/jvmTest/kotlin/io/modelcontextprotocol/kotlin/sdk/integration/kotlin/websocket/WebSocketIntegrationTest.kt

@@ -1,4 +1,4 @@
-package io.modelcontextprotocol.kotlin.sdk.integration
+package io.modelcontextprotocol.kotlin.sdk.integration.kotlin.websocket
 
 import io.ktor.client.HttpClient
 import io.ktor.server.application.install
@@ -22,7 +22,6 @@ import io.modelcontextprotocol.kotlin.sdk.server.mcpWebSocket
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.test.runTest
 import kotlinx.coroutines.withContext
-import kotlin.test.Ignore
 import kotlin.test.Test
 import kotlin.test.assertTrue
 import kotlin.time.Duration.Companion.seconds
@@ -34,7 +33,6 @@ import io.ktor.server.websocket.WebSockets as ServerWebSockets
 class WebSocketIntegrationTest {
 
     @Test
-    @Ignore // Ignored because it doesn’t work with wasm/js in Ktor 3.2.3
     fun `client should be able to connect to websocket server 2`() = runTest(timeout = 5.seconds) {
         var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
         var client: Client? = null
@@ -47,7 +45,7 @@ class WebSocketIntegrationTest {
             }
         } finally {
             client?.close()
-            server?.stopSuspend(1000, 2000)
+            server?.stop(1000, 2000)
         }
     }
 
@@ -59,7 +57,6 @@ class WebSocketIntegrationTest {
      * 3. Observe that Client A receives a response related to it.
      */
     @Test
-    @Ignore // Ignored because it doesn’t work with wasm/js in Ktor 3.2.3
     fun `single websocket connection`() = runTest(timeout = 5.seconds) {
         var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
         var client: Client? = null
@@ -75,7 +72,7 @@ class WebSocketIntegrationTest {
             }
         } finally {
             client?.close()
-            server?.stopSuspend(1000, 2000)
+            server?.stop(1000, 2000)
         }
     }
 
@@ -88,7 +85,6 @@ class WebSocketIntegrationTest {
      * 4. Observe that Client B (connection #2) receives a response related to sessionId#1.
      */
     @Test
-    @Ignore // Ignored because it doesn’t work with wasm/js in Ktor 3.2.3
     fun `multiple websocket connections`() = runTest(timeout = 5.seconds) {
         var server: EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration>? = null
         var clientA: Client? = null
@@ -112,7 +108,7 @@ class WebSocketIntegrationTest {
         } finally {
             clientA?.close()
             clientB?.close()
-            server?.stopSuspend(1000, 2000)
+            server?.stop(1000, 2000)
         }
     }
 
@@ -138,7 +134,7 @@ class WebSocketIntegrationTest {
         return client
     }
 
-    private suspend fun initServer(): EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration> {
+    private fun initServer(): EmbeddedServer<CIOApplicationEngine, CIOApplicationEngine.Configuration> {
         val server = Server(
             Implementation(name = "websocket-server", version = "1.0.0"),
             ServerOptions(
@@ -175,7 +171,7 @@ class WebSocketIntegrationTest {
             }
         }
 
-        return ktorServer.startSuspend(wait = false)
+        return ktorServer.start(wait = false)
     }
 
     /**