Refactor(ProviderIntegrations): Yalidine and Procolis

[yacinediaf]

Instead of creating a new Guzzle client for each function call, which is resource-intensive.

For example: imagine within a business logic you needed fees with parcels or any other combination of data; here you need to build the Guzzle client multiple times. for each function call :

gerPercels(), getFees()

So it is convenient to create one client on each object creation and use it multiple times. each provider integration has its own client initialization using the appropriate headers.

I have another refactoring ideas on how to restructure the package and remove unnecessary classes in a cleaner way; reach out to me if you're interested.