In-app way to do basic photo edits / cropping

[cyberkitsune]

Is your feature request related to a problem? Please describe.
Currently, when attaching a photo, the only editing options are to change the thumbnail location and add alt text. If one wants to crop the photo, add filters, etc. They must do it out of app first. This is fairly inconvenient.

Describe the solution you'd like
Other social media apps give some basic editing functionality to photos in-app, such as cropping, markup, filters, etc. I would love for metatext to add a similar function!

Describe alternatives you've considered
The current alternative is to use a different app (or the stock Photos app) to edit the photo. As mentioned before, this is rather inconvenient. (Especially so when doing multiple images!)