Integrate build stdlib-stubs script into micropython stubber.

[Josverl]

Currently micropython-stdlib-stubs package is created by a stand alone python script in the stubs repo.

it would be simpler if this script would be part of the MicroPython stubber tool in this repo

https://github.com/Josverl/micropython-stubs/blob/main/publish/micropython-stdlib-stubs/build.py
https://github.com/Josverl/micropython-stubs/blob/main/publish/micropython-stdlib-stubs/README.md

• integrate this as a seperate command in stubber
• options for fetch typeshed ,
• need to find a sensible option to build and publish withouth duplicating effots , possibly accep 'stdlib' as the name of the port to build ?
• add tests
• validate