refactor: remove dead RegistryPluginRow and update docs for toggle location

Author: datlechin

TablePro/Views/Settings/Plugins/RegistryPluginRow.swift

@@ -387,7 +387,7 @@ TablePro ships with 8 built-in database driver plugins:
 | Redis | Redis | 6379 |
 | Oracle | Oracle | 1521 |
 
-Each plugin has a toggle to enable or disable it. Disabled plugins hide their database type from the connection dialog and prevent connections to that database type.
+Select a plugin to enable or disable it using the toggle in the detail pane. Disabled plugins hide their database type from the connection dialog and prevent connections to that database type.
 
 ### Plugin Details