Download rework (#22)

* rework server to send download ready back via signalr

* adjust queue handling for removal

* adjust api to main

Co-authored-by: rootdarkarchon <root.darkarchon@outlook.com>

MareSynchronosServer/MareSynchronosShared/Utils/IdBasedUserIdProvider.cs

@@ -0,0 +1,11 @@
+using Microsoft.AspNetCore.SignalR;
+
+namespace MareSynchronosShared.Utils;
+
+public class IdBasedUserIdProvider : IUserIdProvider
+{
+    public string GetUserId(HubConnectionContext context)
+    {
+        return context.User!.Claims.SingleOrDefault(c => string.Equals(c.Type, MareClaimTypes.Uid, StringComparison.Ordinal))?.Value;
+    }
+}