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

src/NadekoBot/Modules/Searches/_Common/E621Object.cs

@@ -0,0 +1,24 @@
+#nullable disable
+namespace NadekoBot.Modules.Searches.Common;
+
+public class E621Object
+{
+    public FileData File { get; set; }
+    public TagData Tags { get; set; }
+    public ScoreData Score { get; set; }
+
+    public class FileData
+    {
+        public string Url { get; set; }
+    }
+
+    public class TagData
+    {
+        public string[] General { get; set; }
+    }
+
+    public class ScoreData
+    {
+        public string Total { get; set; }
+    }
+}