breaking(ui-shell): remove GlobalHeader, SideNav folders (#1223)

* breaking(ui-shell): remove GlobalHeader/SideNav folders

* Run "yarn build:docs"

types/UIShell/SideNav.svelte.d.ts

@@ -0,0 +1,51 @@
+/// <reference types="svelte" />
+import { SvelteComponentTyped } from "svelte";
+
+export interface SideNavProps
+  extends svelte.JSX.HTMLAttributes<HTMLElementTagNameMap["nav"]> {
+  /**
+   * Set to `true` to use the fixed variant
+   * @default false
+   */
+  fixed?: boolean;
+
+  /**
+   * Set to `true` to use the rail variant
+   * @default false
+   */
+  rail?: boolean;
+
+  /**
+   * Specify the ARIA label for the nav
+   * @default undefined
+   */
+  ariaLabel?: string;
+
+  /**
+   * Set to `true` to toggle the expanded state
+   * @default false
+   */
+  isOpen?: boolean;
+
+  /**
+   * The window width (px) at which the SideNav is expanded and the hamburger menu is hidden
+   * 1056 represents the "large" breakpoint in pixels from the Carbon Design System:
+   * small: 320
+   * medium: 672
+   * large: 1056
+   * x-large: 1312
+   * max: 1584
+   * @default 1056
+   */
+  expansionBreakpoint?: number;
+}
+
+export default class SideNav extends SvelteComponentTyped<
+  SideNavProps,
+  {
+    open: CustomEvent<null>;
+    close: CustomEvent<null>;
+    ["click:overlay"]: CustomEvent<null>;
+  },
+  { default: {} }
+> {}