Add Steam auth, platform validators & name gen

RecNet.Domain/Entities/Profiles/IProfileRepository.cs

@@ -0,0 +1,16 @@
+using RecNet.Domain.Common;
+using RecNet.Domain.Entities.Profiles;
+
+namespace RecNet.Domain.Repositories;
+
+public interface IProfileRepository
+{
+    Task<Profile?> GetByIdAsync(Guid profileId, CancellationToken ct = default);
+    Task<IReadOnlyList<Profile>> GetByIdsAsync(List<Guid> profileIds, CancellationToken ct = default);
+    
+    Task<Profile?> GetByPlatform(PlatformType platform, string platformId, CancellationToken ct = default);
+
+    Task AddAsync(Profile profile, CancellationToken ct = default);
+
+    Task SaveChangesAsync(CancellationToken ct = default);
+}