Review user feedback with regards to terminology that needs to be defined

[eddieantonio]

We now have a legend page!

• It's up at https://itwewina.altlab.app/legend
• Its source code is here: https://github.com/UAlbertaALTLab/cree-intelligent-dictionary/blob/main/src/CreeDictionary/CreeDictionary/templates/CreeDictionary/legend.html

We need to review user feedback on what things are confusing. I believe we may want to add descriptions of emoji, but perhaps other unexplained things as well (bolded forms in paradigms, etc.).

@aarppe, feel free to tackle this directly since the coding part is finished. I've put a few automated checks in place to ensure the legend page appears correctly.