docs: add diagrams for decorator, delegation, dependency injection, dirty flag, domain model, double buffer, double-checked locking, double dispatch, and dynamic proxy

dependency-injection/README.md

@@ -35,6 +35,10 @@ Wikipedia says
 
 > In software engineering, dependency injection is a technique in which an object receives other objects that it depends on. These other objects are called dependencies.
 
+Sequence diagram
+
+![Dependency Injection sequence diagram](./etc/dependency-injection-sequence-diagram.png)
+
 ## Programmatic Example of Dependency Injection Pattern in Java
 
 The old wizard likes to fill his pipe and smoke tobacco once in a while. However, he doesn't want to depend on a single tobacco brand only but likes to be able to enjoy them all interchangeably.