feat: add DTOs for basic endpoints

DTOs/SubsonicResponseDTO.cs

@@ -0,0 +1,36 @@
+using System.Text.Json.Serialization;
+using System.Xml.Linq;
+using System.Xml.Serialization;
+
+namespace Shadow.DTOs;
+
+public class SubsonicResponseDTO
+{
+	[JsonPropertyName("status")]
+	public string Status { get; set; } = "ok";
+
+	[JsonPropertyName("version")]
+	public string version { get; set; } = "1.15.0";
+
+	[JsonPropertyName("type")]
+	public string type { get; set; } = "shadow";
+
+	[JsonPropertyName("serverVersion")]
+	public string serverVersion { get; set; } = $"0.0.1 ({ThisAssembly.Git.Commit})";
+
+	[JsonPropertyName("openSubsonic")]
+	public bool openSubsonic { get; set; } = true;
+
+	[JsonPropertyName("error")]
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public ErrorDTO? error { get; set; } = null;
+
+	[JsonPropertyName("albumList2")]
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public AlbumList2DTO? albumList2 { get; set; } = null;
+
+	[JsonPropertyName("user")]
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public UserPingDTO? userPing { get; set; } = null;
+
+}