Add gowall

[Achno]

New App Submission

• I've read the contribution guidelines.

Repo or homepage link:
https://github.com/Achno/gowall

Description:
Convert a Wallpaper's color scheme and customize it with a plethora of image processing features. (written in go)

Why I think it's awesome:

• Transforms the color scheme of your wallapper to your favorite theme (catppuccin, everforest...) to match your system's theme, now you only need to like the design of the wallpaper and not worry about its colors.
• A lot of image processing features like (upscaling,drawing borders, converting to pixel art) so you can perfect your wallpaper.
• Really well documented : https://achno.github.io/gowall-docs/ providing visual examples for every image processing feature.