feat: remove `ApplicationContext` and replace it with a new interface for `DeferredProvider`.

[francescovallone]

Description

The current interface for DeferredProviders's init function is unclear and allow to access providers out of the scope. This can lead to misuse of the contextualized scope resulting in wrong usage.
The function signature should be changed to the following:
(...providers) async {}

The ...providers are the same providers defined in the inject property and follow the same order.
If one or more providers of the dependencies is yet to be initialized, then the current initialization is stopped to correctly init all its dependencies.

Requirements

• Change the function signature of the init params.
• Check for circular dependencies
• Remove the ApplicationContext
• Update the documentation
• Update the tests