implement bookmark collections and enhance bookmark search functionality

packages/core/src/collection.ts

@@ -7,4 +7,30 @@ interface Collection {
 	bookmarks: Bookmark[]
 }
 
+/**
+ * Finds bookmarks in a collection that match the given criteria
+ * @param collection The collection to search in
+ * @param options Optional search criteria
+ * @returns Array of matching bookmarks
+ */
+function findCollectionBookmarks(
+	collection: Collection,
+	options?: {
+		searchTerm?: string
+	}
+): Bookmark[] {
+	if (!options?.searchTerm) {
+		return collection.bookmarks
+	}
+
+	const searchTerm = options.searchTerm.toLowerCase()
+	return collection.bookmarks.filter((bookmark) => {
+		return (
+			bookmark.title.toLowerCase().includes(searchTerm) ||
+			bookmark.url.toLowerCase().includes(searchTerm)
+		)
+	})
+}
+
 export type { Collection }
+export { findCollectionBookmarks }