feat: add version string parameter to Server constructor

Author: restlessronin

Diff for: src/mcp/server/__init__.py

@@ -101,8 +101,9 @@ def __init__(
 
 
 class Server:
-    def __init__(self, name: str):
+    def __init__(self, name: str, version: str | None = None):
         self.name = name
+        self.version = version
         self.request_handlers: dict[
             type, Callable[..., Awaitable[types.ServerResult]]
         ] = {
@@ -114,7 +115,6 @@ def __init__(self, name: str):
 
     def create_initialization_options(
         self,
-        version: str | None = None,
         notification_options: NotificationOptions | None = None,
         experimental_capabilities: dict[str, dict[str, Any]] | None = None,
     ) -> InitializationOptions:
@@ -134,7 +134,7 @@ def pkg_version(package: str) -> str:
 
         return InitializationOptions(
             server_name=self.name,
-            server_version=version if version else pkg_version("mcp"),
+            server_version=self.version if self.version else pkg_version("mcp"),
             capabilities=self.get_capabilities(
                 notification_options or NotificationOptions(),
                 experimental_capabilities or {},