Devcontainer update

[bablokb]

This adds support for Github-codespaces for CP 9.x.x.

It fixes #9029.

Another major change is that the devcontainer-alternatives are now on a per port basis (major speedup in codespace creation since the codespace only fetches submodules relevant to the selected port). Currently only ports using espressif and cortex-m are supported.

[dhalbert]

You should be able to use pre-commit locally to catch these: https://learn.adafruit.com/building-circuitpython/build-circuitpython#install-pre-commit-3096511

[bablokb]

The problem is that trailing whitespace is valid markup (two trailing blanks signal a line break), so I think you should change pre-commit. Anyhow, I removed the whitespace so this is fine now.

[dhalbert]

I think it would be better to use <br> in general: it's valid markdown and is not invisible like trailing whitespace. But no problem here now.

[dhalbert]

Thanks! I think it would be good to write this up in https://adafruit-playground.com/. I could link to that from the "Building CircuitPython" guide and/or at least link to the Readme here.

[bablokb]

it would be good to write this up in https://adafruit-playground.com/.

Yes, that is on my todo-list.

[bablokb]

@dhalbert : Note on Adafruit-Playground is available:https://adafruit-playground.com/u/picofun/pages/using-github-codespaces-for-circuitpython-development

[dhalbert]

@bablokb I have added a page in the Building CircuitPython guide that points to your Playground note. I will also blog it on the Adafruit blog.

[dhalbert]

https://blog.adafruit.com/2024/03/25/using-github-codespaces-for-circuitpython-development-adafruitplayground-featurednote-adafruit/