Implement automatic VS Code MCP installation #2

Implement automatic VS Code installation functionality for the MagicUI CLI, similar to how other tools like Cursor and Windsurf handle their installations. This should provide a seamless setup experience for users who want to use MagicUI with VS Code.

• Create functionality to automatically configure VS Code's MCP (Model Context Protocol) settings
• Target file: ~/Library/Application Support/Code/User/mcp.json (macOS)
• Handle cross-platform paths for Windows and Linux:
  • Windows: %APPDATA%\Code\User\mcp.json
  • Linux: ~/.config/Code/User/mcp.json

2. Configuration Format

The MCP configuration should follow this JSON structure:

{
	"servers": {
		"magicui": {
			"command": "npx",
			"args": [
				"-y",
				"@magicuidesign/mcp@latest"
			]
		}
	}
}