[Qualify of Life] Rework the github updater to not depend on Devkitpro

[Raytwo]

Have you read the disclaimer before proceeding?

• [X] I have read the disclaimer.

Explain what could get improvements.

Rewriting the updater to not use DKP would make build times shorter and the binary smaller, as well as making ARCropolis less difficult to compile for other people.

How could we make this better?

Use the curl methods from Smash through the skyline::from_offset macro