Fix various C# exceptions

- Replace `IndexOutOfRangeException` with `ArgumentOutOfRangeException`
- Replace `Exception` with a more specific exception
- Add the parameter name to argument exception
- Update documentation for methods that throw exceptions
- Use `StringBuilder` to build exception messages
- Ensure exception messages end with a period

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/MarshalUtils.cs

@@ -16,7 +16,7 @@ namespace Godot.SourceGenerators
                 INamedTypeSymbol GetTypeByMetadataNameOrThrow(string fullyQualifiedMetadataName)
                 {
                     return compilation.GetTypeByMetadataName(fullyQualifiedMetadataName) ??
-                           throw new InvalidOperationException("Type not found: " + fullyQualifiedMetadataName);
+                           throw new InvalidOperationException($"Type not found: '{fullyQualifiedMetadataName}'.");
                 }
 
                 GodotObjectType = GetTypeByMetadataNameOrThrow("Godot.Object");