feat: library calls

[enitrat]

In this section, we show an example of how to perform a Library Call in Cairo using the high-levels LibraryDispatcher and LibraryDispatcherTrait which perform a library_call syscall (reference here https://docs.starknet.io/documentation/architecture_and_concepts/Contracts/system-calls/#library_call)

Library calls are used to invoke functions from classes directly, not contracts.
It is already covered in surface in the Cairo book but the section needs to be reworked.

This example will demonstrate the implementation of a very simple contract intended to be used as a library, and how we can use XXXLibraryDispatcher to make library calls to this contract from another contract.
A simple could be a contract named MathUtils with a add function and from our contract we could call IMathUtilsLibraryDispatcher.add(a,b)

[neelkamath]

Is this for using a library via Scarb?

[enitrat]

Just updated the description @neelkamath, sorry for the confusion

[OkoliEvans]

Is this issue still open? I'd love to work on it @julio4 @enitrat

[julio4]

Is this issue still open? I'd love to work on it @julio4 @enitrat

Hello, yes I can assign you!

[OkoliEvans]

Is this issue still open? I'd love to work on it @julio4 @enitrat

Hello, yes I can assign you!

Okay, thank you

[julio4]

@OkoliEvans Do you need any help for this?

[OkoliEvans]

I started working on it this morning, I have not had any blocks yet. I will reach out if I need any assistance @julio4