feat: Added a new .edit mcp-config subcommand in the REPL

REPL.md

@@ -217,6 +217,7 @@ The `.edit` command lets you modify configuration files for the current mode of
 configuration in your preferred text editor. It lets you modify the following configurations:
 
 * `.edit config` - Modify the global configuration
+* `.edit mcp-config` - Modify the MCP servers configuration file (`mcp.json`)
 * `.edit role` - Modify the active role's configuration
 * `.edit session` - Modify the active session's configuration
 * `.edit agent-config` - Modify the active agent's configuration