Update MCP template server.json for new registry specification

Co-authored-by: timheuer <4821+timheuer@users.noreply.github.com>

Author: Copilot

src/ProjectTemplates/Microsoft.Extensions.AI.Templates/src/McpServer/McpServer-CSharp/.mcp/server.json

@@ -1,21 +1,22 @@
 {
   "$schema": "https://modelcontextprotocol.io/schemas/draft/2025-07-09/server.json",
   "description": "<your description here>",
-  "name": "io.github.<your GitHub username here>/<your repo name>",
+  "id": "io.github.<your GitHub username here>/<your repo name>",
+  "version": "0.1.0-beta",
   "packages": [
     {
-      "registry_name": "nuget",
-      "name": "<your package ID here>",
+      "registry_type": "nuget",
+      "identifier": "<your package ID here>",
       "version": "0.1.0-beta",
+      "transport": {
+        "type": "stdio"
+      },
       "package_arguments": [],
       "environment_variables": []
     }
   ],
   "repository": {
     "url": "https://github.com/<your GitHub username here>/<your repo name>",
     "source": "github"
-  },
-  "version_detail": {
-    "version": "0.1.0-beta"
   }
 }

test/ProjectTemplates/Microsoft.Extensions.AI.Templates.IntegrationTests/Snapshots/mcpserver.Basic.verified/mcpserver/.mcp/server.json

@@ -1,21 +1,22 @@
 {
   "$schema": "https://modelcontextprotocol.io/schemas/draft/2025-07-09/server.json",
   "description": "<your description here>",
-  "name": "io.github.<your GitHub username here>/<your repo name>",
+  "id": "io.github.<your GitHub username here>/<your repo name>",
+  "version": "0.1.0-beta",
   "packages": [
     {
-      "registry_name": "nuget",
-      "name": "<your package ID here>",
+      "registry_type": "nuget",
+      "identifier": "<your package ID here>",
       "version": "0.1.0-beta",
+      "transport": {
+        "type": "stdio"
+      },
       "package_arguments": [],
       "environment_variables": []
     }
   ],
   "repository": {
     "url": "https://github.com/<your GitHub username here>/<your repo name>",
     "source": "github"
-  },
-  "version_detail": {
-    "version": "0.1.0-beta"
   }
 }