feat: add a return of the data that has been configured

ApiDto/Responses/TotpKeyResponse.cs

@@ -0,0 +1,17 @@
+namespace Mirea.Api.Dto.Responses;
+
+/// <summary>
+/// Represents the response containing the TOTP (Time-Based One-Time Password) key details.
+/// </summary>
+public class TotpKeyResponse
+{
+    /// <summary>
+    /// Gets or sets the secret key used for TOTP generation.
+    /// </summary>
+    public required string Secret { get; set; }
+
+    /// <summary>
+    /// Gets or sets the image (QR code) representing the TOTP key.
+    /// </summary>
+    public required string Image { get; set; }
+}