Docs: missing documentation about certain features

[r3ps4J]

Hi! I didn't think this would fit into the bug or feature request categories so I picked a blank issue.

Currently the readme links to the documentation a couple of features, but the links don't work. I also couldn't find the information about these topics somewhere else in the documentation.

The links I am refering to:

• Matchmaker: https://projecterror.dev/docs/npwd/dev/disable_apps
• Themes: https://projecterror.dev/docs/npwd/dev/setup/#setting-up-the-theme
• Icon Sets: https://projecterror.dev/docs/npwd/dev/setup/#adding-icons

All three of these are things I'd like to change, so could documentation be added for those? (or re-added, I assume the links worked in the past)

Apart from that many of the images under the features section no longer work and just redirect to the imgur homepage. And I couldn't find the icon set setting in the phone settings in-game on a fresh install of qbox.