parse: Drop NoteSkipper wrapper class

parse: Drop enum class in favor of DIY method ...

This is slightly sketchy but should be enough to get MicroPython working
with the new parser.

parse: Create messages from ParseTasks

parse: Add filename to error messages

parse: Create messages from ParseErrors

parse: Rename ParseError messages to ParserError

parse: Don't generate message ids, use a table ...

I've decided that all translation strings should be used in source code
as-is without any kind of building.

parse: Add function to fully format an error

parse: Add function to format a ParseContext for display

parse: Add function to format a ParseErrorException for display

src: Check for None in all __eq__ methods ...

This lets us finally compare parse error exceptions and contexts of
different shapes.

parse: Have parse run parse_file

parse: Actually add parser code for real this time I promise

parse: Add directive parser

parse: Add conditional statement parser

parse: Add Set node parse code ...

I've taken a different approach this time with my tests by avoiding
decorated functions where I can and adding big upfront documentation
about how things work.

I've deprecated the old decorated functions and hopefully will remove
them during a refactor and cleanup.

parse: Don't mutate self.parse_value ...

I don't quite understand why this is happening but mutmut will replace
this effectful function with 'None' and cause the loop to loop forever.

parse: Add newline to make printing ParseContexts easier

parse: Add statement parsing

parse: Add code for parsing values

parse: Reserve keywords for reference names

parse: Parse a reference node

src: Rename syntax to token

parse: Remove SyntaxType ...

Once again I find myself in the pattern of having a useless 'type' value
that just complicates my life. In this case the correct appproach is to
output the AST directly.

parse: Parse text and bools to AST types

parse: Check types when clearing notes, add extra tests

parse: Pass a context to the parse function

parse: Have parse_text handle contexts properly

parse: dNonnescent -> descent ?

parse: Have parse_bool handle contexts properly