Add enough info to the wiki page for newcomers to know how it all works

[raucao]

https://wiki.kosmos.org/Kredits

• Maybe some kind of diagram/chart that shows how it all works, incl. what's on Ethereum, IPFS, etc.
• Make sure all components are documented well
• Add detailed information about the current layout/mechanics of how tokens work, which tokens exist, and why, etc.
• Add a roadmap for features we already know we want in the near future
• Add information for how to get started if someone wants to contribute to any part of Kredits, as well as information about how to (currently) use it as a Kosmos (not Kredits) contributor (maybe on a seperate contributor onboarding page). I.e. GitHub labels, etc.
• List/link open discussions, ideas, etc.

[raucao]

Closing this, as most of it has been done, and we can/should open concrete issues for the rest.