Make files into FileIcons

[jojo2357]

The problem wasn't that the image was an .svg as originally thought. The problem is that the icons were absolute paths rather than resolvable icon names. Therefore we need to load it as the file that it is

@nokyan should we add more logic to this? I only forsee needing to handle ./? or ~/ but I am not sure if those are supported.

fixes #291

[nokyan]

Hi, thank you for the PR!
I think adding a small bit of logic to handle ~ paths could be beneficial. Replacing ~ with what's in $HOME should suffice, something similar is done in src/utils/apps.rs:38.
Putting a simple function that replaces ~ with $HOME into src/utils.rs and using that function for both src/utils/apps.rs:38 and your fix in src/utils/app.rs:241 would be the way to go here I think. :)

[jojo2357]

I also took the liberty of removing the snap check. If it is a snap, the icon will probably also be a file and will pass anyway.

I don't have snaps on my machine so that will need testing

[nokyan]

I also took the liberty of removing the snap check. If it is a snap, the icon will probably also be a file and will pass anyway.

I don't have snaps on my machine so that will need testing

I don't use Snaps either, I'll check it out in an Ubuntu VM tomorrow or so

[nokyan]

Works under Ubuntu with Snaps, thank you. :)

[jojo2357]

I always knew it would 🙃