feat: Add MCP server installation via URL protocol (#5351)

* Add MCP server installation via URL protocol

Implement handler for cherrystudio://mcp/install URLs to add MCP servers
from encoded configuration data. Supports multiple server configuration
formats and adds a new IPC channel for server addition.

* feat: Enhance MCP protocol handling and navigation

- Implemented navigation to the '/settings/mcp' page using executeJavaScript in the MCP protocol URL handler.
- Updated NavigationService to expose the navigate function globally for easier access in the application.
- Added NavigateFunction type to the global environment for improved type safety in navigation operations.

---------

Co-authored-by: kangfenmao <kangfenmao@qq.com>

src/main/services/ProtocolClient.ts

@@ -1,3 +1,4 @@
+import { handleMcpProtocolUrl } from './urlschema/mcp-install'
 import { windowService } from './WindowService'
 
 export const CHERRY_STUDIO_PROTOCOL = 'cherrystudio'
@@ -22,6 +23,12 @@ export function handleProtocolUrl(url: string) {
   const urlObj = new URL(url)
   const params = new URLSearchParams(urlObj.search)
 
+  switch (urlObj.hostname.toLowerCase()) {
+    case 'mcp':
+      handleMcpProtocolUrl(urlObj)
+      return
+  }
+
   // You can send the data to your renderer process
   const mainWindow = windowService.getMainWindow()