src: Move all source code to src/newlang ...

The Python ecosystem works much better if we deicide our source code
is actually a module named 'newlang'.

I've been putting off changing this for a long time, but I might as
well do it now.

parse: Rename oldparse back to parse ...

This is the primary actually working parser, not an old one.

tests: Move parse to its own directory

tests: parse_boolean -> parse_bool

tests: Move draw_token_by_value to syntax

parse: Clear notes as first parse step

parse: Add clear_notes function to handle removing comments

tests: Remove dead code in draw_note_value_token ...

I probably kept this when copy pasting from draw_text_value_token.

parse: Put skip_note in its own class for testing

parse: Wrap parse functionality to allow mock testing

parse: Parse boolean values

parse: Add skip_note for parsing notes

parse: Add ParseError and ParseErrorException for error reporting

parse: Ignore whitespace in text, instead join words with spaces ...

This cuts down on complexity as now only the tokenizer deals with
whitespace and makes whitespace no longer a factor in the language.

tests: parse: Add helper insert_random function ...

This is just to help clean up some complicated looking code.

tests: parse: Document draw_token_by_value

tests: syntax: Rename draw_token_location to draw_syntax_location

tests: tokenize: Move syntax tests to new file

tokenize: Move syntax to its own module

tests: parse: Add draw_token_by_value function

tests: parse: Move syntax tests to tokenize ...

This helps with mutmut.

tests: parse: Remove unused code

parse: Move Syntax to tokenize and replace Token ...

These are basically the same classes so merge them

parse: Don't nest tokens in values ...

Now that we don't need to copy the TokenType we can just copy the value
directly.

tokenize: Remove TokenType enum ...

In practice this wasn't used: The parse code always checks the value AND
the type. So just check the value only.

tests: parse: Test that parse_text fails with extra StartText tokens

tests: parse: Test invalid content

tests: parse: Draw text syntax tokens ...

This requires fixing a bug for comparing values of different types.

parse: tests: Clarify errors and tests

tests: parse: Draw classified tokens for better coverage