Investigate whether it's possible to use MySQL in Python programs in a web browser

[tuzz]

One of the items requested from the user research was that we need to be able to run SQL queries in the code editor. We can already do this with the sqlite3 module, but we should investigate whether it's possible to use MySQL as well. I think it probably is possible to execute the queries but I don't think there would be a way to run the database itself in the web browser, but we should find out for sure.

[sra405]

deprioritised