Migrate to Jupyter lab

[calum-chamberlain]

I have run into some plotting asyncio issues from current jupyter notebooks in the GPHS445 set of notebooks that have been fixed in jupyter lab. I think we should consider switching to using jupyter lab for this which allows us to run jupyter notebooks in a more modern and maintained set-up, and run other things (like opening text files and a terminal in the browser) which might make it easier to introduce writing scripts to our students.

We should consider introducing writing scripts to our students at the end of the labs!

[calum-chamberlain]

This migration could facilitate an additional final short lab that introduces:

• [x] scripts,
• [x] the command line,
• [x] running scripts and
• [x] installing packages.

[calum-chamberlain]

Done in master.