Refactor strategies into a base class and child classes, good ol' OOO

[quantinuum-richard-morrison]

Same code but refactored into classes with inheritance.

• more pythonic (subjective, hand-wavy)
• encapsulates functionality in classes, fewer names in the namespace (no more listen_job_status, hybrid_wait...)
• fewer lines of python
• extensible (user could subclass and adjust to their needs; the WaitStrategy is otherwise baked-in to qnexus and only offers three choices)
• HybridStrategy explicitly uses the methods of its parent classes
• shares code (not much, admittedly, but it's key logic: repeating key logic was previously repeated across multiple functions)