Atom is a framework for creating memory efficient Python objects with enhanced
features such as dynamic initialization, validation, and change notification
for object attributes. It provides the default model binding behavior for the
Enaml UI framework.

Key features:
* Memory efficient object creation
* Dynamic attribute initialization
* Attribute validation
* Change notification system
* Type annotation support (atom 0.8.0+)
* Enhanced property system

Atom objects can be defined using traditional class-based approach or modern
type annotations, making it suitable for both legacy and modern Python
codebases.