Refactor to use latest version of PyBASIC

[JiFish]

Pull input changes from PyBasic richpl/PyBasic#19

[brickbots]

Hi Hi! If/When my PR to PyBasic for the modularization and I/O abstraction gets merged, I'd be willing to help with the job of re-integrating PyBasic into Artemis.

As you sagely pointed out, there's still some thought to be done around the mechanism for extending PyBasic with new functions/keywords, but maybe it can all come together and make it easier to integrate upstream changes into the Artemis project.

[JiFish]

Apologies for the radio silence @brickbots. I can't believe it been two months since I put this on my TODO list.

I do plan to pull in all the new changes, which will require a small refactor my end. I am eager to find time to do this around my Christmas holidays. I'm especially excited about vintage compatibility and getting rid of the need to fork.

I'll be sure to pick your mind if you are available.

[brickbots]

No apologies needed! I've gotten a bit sidetracked as well recently :-)

After clarifying some of the goals of PyBasic (simple code/readability) I've started on a fork that will give up some ease of understanding for a more extensible/re-useable approach. I've already implemented and solidified all the I/O abstraction I pitched for PyBasic and I'm starting to work on restructuring the interpreter to make adding new keywords/functions via subclassing easier without modifying any of the core files.

https://github.com/brickbots/Basic2040

It might be an easier lift to integrate this fork for Artemis, and I'd be keen to collaborate on the extensibility mechanism if you have ideas.

[JiFish]

Sounds good. I'll be in touch.