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

src/NadekoBot/Modules/Utility/_Common/Exceptions/StreamRoleNotFoundException.cs

@@ -0,0 +1,20 @@
+#nullable disable
+namespace NadekoBot.Modules.Utility.Common.Exceptions;
+
+public class StreamRoleNotFoundException : Exception
+{
+    public StreamRoleNotFoundException()
+        : base("Stream role wasn't found.")
+    {
+    }
+
+    public StreamRoleNotFoundException(string message)
+        : base(message)
+    {
+    }
+
+    public StreamRoleNotFoundException(string message, Exception innerException)
+        : base(message, innerException)
+    {
+    }
+}