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

src/NadekoBot/Modules/Nsfw/_Common/Rule34Object.cs

@@ -0,0 +1,13 @@
+#nullable disable
+namespace NadekoBot.Modules.Nsfw.Common;
+
+public class Rule34Object : IImageData
+{
+    public string Image { get; init; }
+    public int Directory { get; init; }
+    public string Tags { get; init; }
+    public int Score { get; init; }
+
+    public ImageData ToCachedImageData(Booru type)
+        => new($"https://img.rule34.xxx//images/{Directory}/{Image}", Booru.Rule34, Tags.Split(' '), Score.ToString());
+}