chore: import MusifyBackend into monorepo (preserving history)

git-subtree-dir: MusifyBackend
git-subtree-mainline: 6829e769ed
git-subtree-split: ed7b00c2cc

MusifyBackend/Application/PlayLists/Queries/GetPlayListsQuery.cs

@@ -0,0 +1,10 @@
+using Ardalis.Result;
+using Mediator;
+using Musify.Application.Pagination;
+using Musify.Application.PlayLists.Responses;
+
+namespace Musify.Application.PlayLists.Queries
+{
+    public record GetPlayListsQuery(int PageNumber = 1, int PageSize = 10)
+        : IQuery<Result<PaginatedResponse<PlayListApplicationResponse>> >;
+}