DSH Settings Navigation Scroll

DSH Web's left navigation bar can experience content occlusion when too many plugins cause it to exceed the viewport. The `dsh-settings-nav-scroll` plugin resolves this limitation by adding a vertical scrollbar, ensuring that all settings entries are accessible. It is compatible with light and dark themes and major browsers, does not modify core files, and its styles are automatically removed after uninstallation. Users can install, enable, verify, and uninstall the plugin using the specified commands.