January release notes for developer framework

[nrichers]

Internal Notes for Reviewers

This PR includes:

• January release notes for the developer framework
• Updated copyright notice for 2024
• Updated Makefile to generate test descriptions on the fly (looks like I'd missed this in Better test descriptions #144), plus quietened output
• Refreshed notebooks and developer framework HTML docs
• Updated the supported Python versions (and switched to a variable to make future updates easier)

Open items:

• Looks like we might have a couple of new tests without release notes?

  

• [SC-8240] Add warning message for unregistered tests in template validmind-library#316 did a really nice job cleaning up our notebooks, but we need to figure out how to sweat more of the details. E.g. this new notebook that gets linked to from the release notes has some clearly unfinished stuff right at the top that both the original author and reviewer missed:

  

Output

External Release Notes

[nrichers]

@mehdi0501 and @cachafla I have resolved your comments and updated the root comment with the latest output. Could you take another look and let me know if the release notes are ready? (We probably need to update the release date again but I will wait until the release notes are otherwise ready.)

[mehdi0501]

Changes look good to me, thank you for addressing the comments around explanations of the new dev framework features!

[cachafla]

Great 👏

[nrichers]

OK, updated the notebooks one last time and sanity checked that the rendered static site works as expected. Done, merging.