Contains common class and interfaces shared by all modules. This resolves module interdependencies to some degree.
 | Fundamentals of Software Architecture: An Engineering Approach (2020) by Richards, Mark, Ford, Neal |
 | Code: The Hidden Language of Computer Hardware and Software (2022) by Petzold, Charles |
 | The Pragmatic Programmer: Your Journey To Mastery, 20th Anniversary Edition (2nd Edition) (2019) by Thomas, David, Hunt, Andrew |
 | Clean Code: A Handbook of Agile Software Craftsmanship (2008) by Robert C. Martin |
