clear lightfinder joiners

Reviewed-on: #5

LightlessSyncAPI/Dto/Group/GroupJoinDto.cs

@@ -8,4 +8,4 @@ namespace LightlessSync.API.Dto.Group;
 public record GroupPasswordDto(GroupData Group, string Password) : GroupDto(Group);
 
 [MessagePackObject(keyAsPropertyName: true)]
-public record GroupJoinDto(GroupData Group, string Password, GroupUserPreferredPermissions GroupUserPreferredPermissions, bool Finder = false) : GroupPasswordDto(Group, Password);
+public record GroupJoinDto(GroupData Group, string Password, GroupUserPreferredPermissions GroupUserPreferredPermissions) : GroupPasswordDto(Group, Password);

LightlessSyncAPI/SignalR/ILightlessHub.cs

@@ -50,6 +50,7 @@ public interface ILightlessHub
     Task GroupChangeOwnership(GroupPairDto groupPair);
     Task<bool> GroupChangePassword(GroupPasswordDto groupPassword);
     Task GroupClear(GroupDto group);
+    Task GroupClearFinder(GroupDto group);
     Task<GroupJoinDto> GroupCreate();
     Task<List<string>> GroupCreateTempInvite(GroupDto group, int amount);
     Task GroupDelete(GroupDto group);