Initial analysis and planning for ModelContextProtocol.Hosting package

Co-authored-by: halter73 <54385+halter73@users.noreply.github.com>

Author: Copilot

global.json

@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "9.0.100",
+    "version": "8.0.115",
     "rollForward": "minor"
   }
 }