Fix F821 ruff error: replace typer with click in MCP except block

Author: Coding-Dev-Tools

src/deploydiff/cli.py

@@ -86,8 +86,8 @@ def mcp():
     try:
         from click_to_mcp import serve_stdio
     except ImportError:
-        typer.echo("Error: click-to-mcp is required for MCP support. Install with: pip install click-to-mcp", err=True)
-        raise typer.Exit(code=1)
+        click.echo("Error: click-to-mcp is required for MCP support. Install with: pip install click-to-mcp", err=True)
+        raise click.Exit(code=1)
     serve_stdio(main, name="deploydiff")