Add Character data type to Python

[Skivling]

Last year I created a pull request on the original repo to add Characters, but because it's inactive it was never reviewed or merged. If this revival actually happens, I can adapt it to merge into this repo. kantord/LibreLingo#3405

[giorginogreg]

Yes, of course you can! Feel free to send it here and i’ll approve it!

Of course, be sure that this feature doesn’t break the previous yaml course structure