[fine] Parser Table Generator?

Look I'm just thinking hard about converting to a parser generator
because I want to derive the pretty-printer from the parser without
having to repeat myself all over the place.

This parser.py is derived from my old LRParsers project, and should
go back there eventually, but for now I'm driving the work from here.

fine/grammar/pyproject.toml

@@ -0,0 +1,2 @@
+[tool.black]
+line-length=100