make: Use src as module in zipapp ...

Moving to using 'src' as a module for testing broke this, so fix it.

Fixes: 06c8537

parse: Account for EOF when checking for whitespace ...

When parsing a file that doesn't end with whitespace (like a new line),
the parser would choke on having no symbols left. Fix that.

Fixes: 1519cef

parse: Decode file as UTF-8 ...

I was testing the parser with binary input.
Use Unicode instead and make sure we pass it that.

Add test harness and simple fuzz test

make: Add 'grip' target for Markdown development

docs: Add note about syntax being a plan

README: Add readme

make: Add copyright and license notice

make: Build NewLang in separate directory

make: Add 'tidy' command that runs Black code formatter

make: Add way to build NewLang executable

docs: Change Begin* To Start* ...

I just find this much easier to remember.

docs: Replace StartNote/Text with BeginNote/Text ...

I'm not sure how I consistently got this wrong.
If Start is more natural than Begin maybe we should use that instead.

examples: Add license header and note to menu example

examples: Move to docs

docs: Add syntax description

src: Reformat using black

examples: Add guessmyname.txt

.gitignore: Add

Restructure files

Change license to LGPLv2.1+

interp: Don't wrap Bool/Text values with value()

interp: Catch interrupts in System Read

parse: Error when stray EndNote and EndText are found

interp: Implement conditionals and add example to code.txt

interp: Add Equals verb to Text

Add True/False as booleans

interp: Loop program until System Exit

parse: Add filename to ParseLocation

parse: Use ParseLocation class for line numbers