Discuss PR to Move python build dependencies

[Josverl]

I have started a draft PR #12664 to move the various python packages that the build and documentation, and the commit-hooks depend on to a single location.

The package definition has no code or dependencies.
Only extras have been defined for the different tools and usages , docs , lint, and several ports have their build dependencies as port_esp32 or port_nrf

This allows on or more of the dependencies to be installed using the form : pip install .[docs,lint,port_nrf]
The exact versions of the dependencies are then maintained in the pyproject.toml

While I have found a way that this work using the pyproject.toml - there is still a few decision to be made.

• naming : for now I have chosen micropython_tools - mostly to avoid confusion with MicroPython being installed.
• 'pip' installation of extras, always installs the package itself as well.
• using a dynamic version scheme works - but is slight different from the preview version numbers now used since v1.21.0
• also the dynamic scheme is quite slow compared to a static version number.

I want to use this discussion to get feedback on what works, and what not , and to use that to improve the PR and finish the remaining work.
So please respond with your comments and questions.