[Feature Request] - Support for .Webp, and .GIF

[Judas87Swiff]

Is your feature request related to a problem? Please describe.
Currently as long as a file is under around 7mb it can be uploaded as a card image but, on mobile browsers the ui/interface won't allow .Webp, and .Gif, but due to a trick accepts a renamed .Gif as a .Png (keeping the image motion data, and playing it properly).

Describe the solution you'd like
Add support for .Webp (a file format that is quite useful AND also can host image motion data as well), and add .GIF and .WEBP to Agnai's import image prompt acceptable file formats list.

Describe alternatives you've considered
Or more 'complicated' add a image file converter to help convert to Agnai's desired file formats.

Additional context
Using websites like EzGif really helps with making gifs/apngs from short clips and compressing them to just the right size to be uploaded, it just adds so much extra work, just to add more interesting cards.