Add initial implementation of API, database, and user management components.

MikrocopApi/Dtos/LoginResponseDto.cs

@@ -0,0 +1,8 @@
+namespace MikrocopApi.Dtos;
+
+public sealed class LoginResponseDto
+{
+    public required string AccessToken { get; init; }
+    public required DateTime ExpiresAtUtc { get; init; }
+    public required string TokenType { get; init; }
+}