Further docs improvements and full spellcheck

[daquinteroflex]

• Emoji drop
• m2r2 conversion.
• Full spellcheck of the repository

[daquinteroflex]

I think ruff screwed up some tests

[tylerflex]

Thanks @daquinteroflex !
There were a lot of typos :D. Also will be fun to have all of these emojis.

About the m2r2, do we need to automatically convert the markdown files to readme every time we change the readme? or how will that work?

[daquinteroflex]

Whoops so any remaining rst converted files are left as a mistake. m2r2 should be working as before with .. mdinclude which was what I was working on to make compatible with sphinx6 and most relevant features are converted (not all but I can implement as necessary little by little).

I will remove the generated rst files and fix the error you mention above and rebase then.