Add documentation for `@Prototype`, AOP Aspects, and why we don't have - "lazy singletons", @Value, "refreshable context"

[rbygrave]

Documentation that still is missing:

@Prototype
AOP Aspects

Plus [design] documentation for, Why avaje-inject does not have ...

Does not have "lazy singleton"
Does not have @Value (why we expect to do external configuration differently including dynamic configuration)
Does not have "refreshable context"