bring back sync_folder or explain how to use dist_dir.

[jshamg]

Is your feature request related to a problem? Please describe.
I'm using micropy-cli which is awesome for setting up your project with stubs, intellisense etc. etc. Problem is, it relies on a src folder which is the synced folder. You guys depracated that config prop (sync_folder) so I tried the dist_dir config prop that also doesn't work. (it tells me in vs code that "Property dist_dir is not allowed.".

Describe the solution you'd like
A config to set a directory to sync to the device.

[UchihaYuki]

I have the exact same problem. Have you solved it?