Consider MixIns for common device behaviours

#1277 unified some stages with common physical axes, meaning plans could potentially be re-used between them.
#1339 adds a new TemperatureController - the existing Linkam device is also a TemperatureController, it could be useful to mark these devices with a MixIn or marker interface to allow plans to be written in a generic way to use either but not so generic as to accept a `Movable[float]`?

This may provide a way forward also for other common scan axes (e.g. wavelength, energy)

## Acceptance Criteria
* A discussion about design of plans has taken place and the conclusion is added to this ticket