[Gitbook docs] Lack of information in Get Started about WASM bindings

[manumonti]

While I was trying to build a new app, I found a lack of information in Get Started with TAC. This caused that I got stuck in the Step 2: Build a Cohort

IMHO, the use of WASM bindings should be documented here as a kind of "prerequisite" or "step 0". The problem I found trying to build a basic app is:

1. nucypher-ts uses nucypher-core as a dependency. nucypher-core contains WASM bindings.
2. To run nucypher-ts (and hence, WASM from nucypher-core) we need a bundler that understands what WASM is.
3. Depending on what project we're running, two good options could be to use Webpack or Craco, but in any case, we need to tell them how to load WASM.

In any case, we have some examples of how to start building a new dApp here, here, and here, that could be linked in this documentation.

_Originally posted by @manumonti in #179

[piotr-roslaniec]

We also have a bunch of integration examples that show how to properly load nucypher-ts with its WASM dependencies.

[piotr-roslaniec]

Addressed in this change set.