refactor(test): add centralized TypeScript server factory for integration tests (#477)

# refactor(test): add centralized TypeScript server factory for
integration tests

  - Create TypeScriptServer class for managing TypeScript MCP servers
  - Add dedicated typescript/ directory with server infrastructure
  - Refactor TsTestBase to use TypeScriptServer for stdio transport
- Extract TypeScript test tools (greet, multi-greet, prompts, resources)
  - Use npx tsx for direct execution (better performance than npm run)
  - Install TypeScript dependencies automatically in test setup

  The TypeScriptServer factory provides:
  - startSse(port): Start SSE transport server
  - startStdio(): Start STDIO transport server
  - stop(): Graceful server shutdown
  - installDependencies(): npm install automation

<!-- Provide a brief summary of your changes -->

## Motivation and Context
To resurrect typescript tests

## How Has This Been Tested?
Locally, CI

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] Test fix

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [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

## Additional context
#475

test-utils/src/main/kotlin/io/modelcontextprotocol/kotlin/test/utils/TypeScriptRunner.kt

@@ -20,11 +20,14 @@ public object TypeScriptRunner {
     public fun run(
         typescriptDir: File,
         scriptPath: String,
+        arguments: List<String> = emptyList(),
         env: Map<String, String> = emptyMap(),
         redirectErrorStream: Boolean = false,
         logPrefix: String = "TS-RUNNER",
     ): Process {
-        val pb = ProcessBuilder("npx", "tsx", scriptPath)
+        val command = mutableListOf("npx", "tsx", scriptPath)
+        command.addAll(arguments)
+        val pb = ProcessBuilder(command)
         pb.directory(typescriptDir)
         env.forEach { (k, v) -> pb.environment()[k] = v }
         pb.redirectErrorStream(redirectErrorStream)