Add Get Started to docs, similar to ethers.js style

[chrisli30]

is this a simplify jsdoc ? TODO: we need to explore the jsdoc solution

i also like the approach of https://docs.ethers.org/v6/api/ where they had getting started to guide end-user through a how-to style, and the api docs look up when you know how to use it, you just need to look up api doc.

i think eventually we should incoporate that kind of style into our https://avaprotocol.org/docs/ethereum/develop/api-reference

Originally posted by @v9n in #32 (review)