feat(web) Add drag n drop upload functionality (#1216)

* Add image drag n drop functionality

* Change upload cover name, background color and opacity

web/src/lib/utils/asset-utils.ts

@@ -0,0 +1,21 @@
+import { api, AddAssetsResponseDto } from '@api';
+import {
+	notificationController,
+	NotificationType
+} from '$lib/components/shared-components/notification/notification';
+
+export const addAssetsToAlbum = async (
+	albumId: string,
+	assetIds: Array<string>
+): Promise<AddAssetsResponseDto> =>
+	api.albumApi.addAssetsToAlbum(albumId, { assetIds }).then(({ data: dto }) => {
+		if (dto.successfullyAdded > 0) {
+			// This might be 0 if the user tries to add an asset that is already in the album
+			notificationController.show({
+				message: `Added ${dto.successfullyAdded} to ${dto.album?.albumName}`,
+				type: NotificationType.Info
+			});
+		}
+
+		return dto;
+	});