Feat: Support for fixing cards

[Mochitto]

As of now, the only way to "fix" cards is to open up anki's html editor and change the code from there.
This is ok but not optimal and if you need to fix the code block it takes time and will loose the code-highlighting.

Proposal:
It would be nice to have a way to "dump" the html from anki into a file, get the markdown version to fix it up and get back the html to inject back into Anki.
This isn't the best flow, but it could allow users to fix the cards relatively easily.