Problems with defining operators about qdata

[co9olguy]

Thanks @therooler, very helpful feedback!

Flagging @josh146 so he sees as well

[josh146]

Thanks @therooler! This is really good to know.

I think this requires fixes in two places:

• Updates to the grammar, so that when lexing, there is a better distinction made between Operators, Terms, Gates, Tensor products.

• Updates to the parser to correctly create the correct IR classes.

This feels like something that should be modified more at the lexing level; the parser should simply be using the generated tokens to map directly from the AST to the IR.