Add support for the OTP `application` behavior

[fadushin]

We have done some work in the atomvm_lib to support the OTP application behavior, and it would be good to port this code and framework into the core AtomVM libraries.

Features would include:

• Allow users to implement the OTP application behavior
• Allow users to define application and module dependencies using OTP .app files, and for the framework to auto-load and auto-start applications in a well-defined order
• Allow users to define applications that auto-start without having to write a start module -- i.e., have the init framework auto-load applications
• Define a configuration model that is a close analog to the OTP config feature, appropriate to the platform (e.g., NVS on ESP32).
• Support users who don't want to use the application framework so that "traditional" AtomVM applications can still run and be developed