add chat and users

src/GreenHome.Application/Interfaces/IDeviceMemberService.cs

@@ -0,0 +1,9 @@
+namespace GreenHome.Application;
+
+public interface IDeviceMemberService
+{
+    Task<IReadOnlyList<DeviceMemberDto>> ListByDeviceAsync(int deviceId, CancellationToken cancellationToken);
+    Task<DeviceMemberDto> UpsertAsync(UpsertDeviceMemberRequest request, CancellationToken cancellationToken);
+    Task DeleteAsync(int deviceId, int userId, CancellationToken cancellationToken);
+    Task<bool> CanManageDeviceAsync(int actorUserId, int deviceId, CancellationToken cancellationToken);
+}