refactor: 📦 Replace hardcoded spacings with design tokens

[Blubtastic]

Describe Problem

Design tokens are nice and all, but we have to actually use them. Without implementing them and enforcing the use throughout the codebase, the benefit will be lost.

Suggest solution

Continuation of #148. Once design tokens are available in the codebase, replace all use of hardcoded spacings. This includes, paddings, margings, gaps and a couple other cases.

Also add documentation for how to use it. Preferrably both in the design tokens file, and in the wiki.