Add the ability to extend Unreal RichText tags using a callback which is invoked whenever an unknown tag is found. This method can create an Inline, which will be added to the TextBlock, or return nullptr if there is no match.

Here is an example of the callback in action:

RichText::SetTryCreateInlineCallback([](const char tagName, Noesis::ArrayRef<RichText::Parameter> parameters, const Noesis::TextBlock parent) -> Noesis::Ptr<Noesis::Inline>
{
if (Noesis::StrEquals(tagName, "run"))
{
return Noesis::MakePtr<Noesis::Run>("A run with some text");
}
return nullptr;
});