refactor: Update default ports for MCPI client and MPCP server

Changes the default ports used by the MCP Inspector client UI and the MCP Proxy server to avoid conflicts with common development ports and provide a memorable mnemonic based on T9 mapping.

server/src/index.ts

@@ -182,7 +182,7 @@ app.get("/config", (req, res) => {
   }
 });
 
-const PORT = process.env.PORT || 3000;
+const PORT = process.env.PORT || 6727;
 
 try {
   const server = app.listen(PORT);