Feature Request: Allow extraction of plain text body from HTML body

[TheElementalOfDestruction]

Code should attempt to extract the plain text body from the HTML body if the HTML body exists but the plain text body does not.

[TheElementalOfDestruction]

I actually specifically looked at and then noted major issues with textract on the discord (the issues explain them partially) that would prevent this from being used. The major one is that it is not plain text as it claims but rather us formatted text, which is not what this module does.

[TheElementalOfDestruction]

Correction, sorry I mixed this up with another module I was looking at because I had been looking at this one for other reasons. No, the biggest problem with trying to use it is that it depends on extract-msg, specially a very old version of it, which could cause severe conflicts. It uses 0.29.* which is the last python 2 supporting version.

https://discord.com/channels/769278425835372555/769278426262536215/986885672071733249
https://github.com/deanmalmgren/textract/blob/master/requirements/python