refactor: remove dead code

Delete unused components, hooks and utilities that have no remaining references, and drop their now-unused exports (augmentations/string, Number.prototype.hoursToMilliseconds). Also drop the dangling ExampleGlobalModalUsage reference from GLOBAL_MODAL_GUIDE.md.

utils/jellyfin/user-library/getItemById.ts

@@ -1,34 +0,0 @@
-import type { Api } from "@jellyfin/sdk";
-import type { BaseItemDto } from "@jellyfin/sdk/lib/generated-client/models";
-import { getUserLibraryApi } from "@jellyfin/sdk/lib/utils/api";
-
-/**
- * Retrieves an item by its ID from the API.
- *
- * @param api - The Jellyfin API instance.
- * @param itemId - The ID of the item to retrieve.
- * @returns The item object or undefined if no item matches the ID.
- */
-export const getItemById = async (
-  api?: Api | null | undefined,
-  itemId?: string | null | undefined,
-): Promise<BaseItemDto | undefined> => {
-  if (!api || !itemId) {
-    return undefined;
-  }
-
-  try {
-    const itemData = await getUserLibraryApi(api).getItem({ itemId });
-
-    const item = itemData.data;
-    if (!item) {
-      console.error("No items found with the specified ID:", itemId);
-      return undefined;
-    }
-
-    return item;
-  } catch (error) {
-    console.error("Failed to retrieve the item:", error);
-    throw new Error(`Failed to retrieve the item due to an error: ${error}`);
-  }
-};