Improve spell checker, at least for french

Summary

Improve the spellchecker with all forms of verbs and compounds.

What is the current behavior?

In french some current words are unknown to the spell checker provided with /e/

What is the improved behavior?

Better spellchecker

What does it bring?

I gave a /e/ Samsung S9 to a non tech user, and she told me that this is very annoying for daily use.

To be sent. I'll update the issue with examples as soon as I have some.

Idem as above.

It could be interested to add words extracted from wikipedia/wiktionary. A forum posts suggested that: https://community.e.foundation/t/correcteur-orthographique-et-suggestions-de-correction/19814/3?u=nathanael I think that the work done by Zythom can help us, he created a file with all unique words in Wikipedia: https://zythom.fr/2020/12/dictionnaire-francais-pour-hashcat/ (in french) and the corresponding repo: https://github.com/Zythom/french-wikipedia-word-list