kaluma flash alternative

[realJoshByrnes]

I'm having a little issue using kaluma flash - wokwi/wokwi-features#545 (seems to be a wokwi bug) but it got me thinking...

• kaluma put works as expected, but there's no way to put the file into the flash memory. As it works differently to flash (not using ymodem) it would be nice to be able to write to the flash.
• kaluma flash (should) writes the file to the device, but there's no way to generate a firmware.uf2 file containing the script, which can then be moved to another device)

Both of these would allow development locally (without using actual hardware) while the issue above exists, and I think they'd both be great features to have (particularly the second, so the resulting image can be shared).

Sorry if I've missed something and either of these features already exist. I did poke around in the source and was unable to find a suitable alternative.

[communix]

I think you want to have uploading one file which have FW, files in file system and java script source code. But we don't have a plan to support this feature now. Since it's a open source project, we are welcome for you to implement this feature for this project.

[jakeg]

Seems similar to my issue kaluma-project/kaluma-cli#38

I expect I'll read the source later, but I'm scratching my head as to where the usercode is stored. If I reflash the .uf2 file (even after switching to MicroPython .uf2) my usercode is still there.