GoSuB Browser Progress, pt4

As character entities are "completed", i can finally tokenize whole strings like "this is © 2023" and have it parsed correctly with the copyright symbol.

I've also done some work in setting up the tokens correctly (yes, with some chatgpt to help me get started). Next up is to fill in more of the tokenizer states, and see if we can parse some start/end tags. If that works, I think the biggest hurdles are completed and it is just a matter of filling in the many states of the tokenizer.