Fixed some crashes in response strings source generator, reorganized more submodules into their folders

src/NadekoBot/Modules/Nsfw/_Common/DapiImageObject.cs

@@ -0,0 +1,21 @@
+#nullable disable
+using System.Text.Json.Serialization;
+
+namespace NadekoBot.Modules.Nsfw.Common;
+
+public class DapiImageObject : IImageData
+{
+    [JsonPropertyName("File_Url")]
+    public string FileUrl { get; set; }
+
+    public string Tags { get; set; }
+
+    [JsonPropertyName("Tag_String")]
+    public string TagString { get; set; }
+
+    public int Score { get; set; }
+    public string Rating { get; set; }
+
+    public ImageData ToCachedImageData(Booru type)
+        => new(FileUrl, type, Tags?.Split(' ') ?? TagString?.Split(' '), Score.ToString() ?? Rating);
+}