118 - Implement shared album feature (#124)

* New features 
  - Share album. Users can now create albums to share with existing people on the network.
  - Owner can delete the album.
  - Owner can invite the additional users to the album.
  - Shared users and the owner can add additional assets to the album.
* In the asset viewer, the user can swipe up to see detailed information and swip down to dismiss.
* Several UI enhancements.

server/src/api-v1/sharing/dto/add-users.dto.ts

@@ -0,0 +1,9 @@
+import { IsNotEmpty } from 'class-validator';
+
+export class AddUsersDto {
+  @IsNotEmpty()
+  albumId: string;
+
+  @IsNotEmpty()
+  sharedUserIds: string[];
+}