refactor(ui): update shared components and add ControlGroup, SidebarContainer

src/shared/ui/Button/ButtonGroup.svelte

@@ -9,7 +9,13 @@ import type { Snippet } from 'svelte';
 import type { HTMLAttributes } from 'svelte/elements';
 
 interface Props extends HTMLAttributes<HTMLDivElement> {
+    /**
+     * Content snippet
+     */
     children?: Snippet;
+    /**
+     * CSS classes
+     */
     class?: string;
 }