Convert `learn` images to SVG

[microlith57]

Because the desktop version of Paradise supports themes, the colour scheme can change. However, the images of the learn action are bitmap, so have little contrast against dark backgrounds:

This could be fixed by converting them to SVG (eg. with Inkscape/Blender) and changing the stroke colour.

I would be happy to implement this :)

[microlith57]

Workflow:

1. Open PNG in Inkscape
2. Right-click bitmap element
3. Use 'Trace Bitmap' to create an outline; tweak settings so it looks nice
4. Delete original; save as SVG

Already did learn at https://pastebin.com/U2GeajnL

@neauoire Any feedback?

[microlith57]

I've converted all the images :)