ICP Rust 101 Tutorial

[moritzfelipe]

First version is here.

https://hackmd.io/r1gt8dHkRAutb3la51d60g

Here is the azle version: https://github.com/dacadeorg/tutorials/blob/main/ICP/typescript-smart-contract-101/content/typescript-smart-contract-101.md

[moritzfelipe]

Feedback

• [x] Make the beginning more like the typescript version, also as short.
• [x] Remove everything mentioning Azle.
• [x] Update the What you'll learn section to add more content like the typescript version.
• [x] Add more relevant things to the Techstack have a look at typescript version.
• [x] Change the numbering everything until 2.4 should go into 1. the setup
• [x] Then 2.4 is where 2 starts and create more substeps, like in the typescript course.
• [ ] Create more thoroughly testing like in typescript course. (3.)