Define standard baseline list to prevent re-definition per-plan

[DiamondJoseph]

Our plans will begin to accept a list[Device] (Readable?) named baseline that are to be read at the start/end of a run in a stream named baseline.

These devices are ancillary devices that are not explicitly included in the scan logic (e.g. upstream optical components). They are likely to be consistent across multiple plans, although they may be overridden by explicitly passed arguments.

Define a list[Device|Readable] either in the dodal module or in this repository that can be re-used as the default argument for this parameter.

[stan-dot]

for the moment I can import the baseline list or copy it into pressure_jump over from the stopflow one.
this issue sounds likely to be generic for many beamlines, what do you think about moving this issue into dodal repo today @DiamondJoseph ?

[DiamondJoseph]

@stan-dot I wanted to see the conclusion of #597 because it probably changes how inject works in blueapi and may make it not required. I'm happy for this issue to move into dodal, as eventually it should be defined alongside the devices.

[DiamondJoseph]

https://github.com/DiamondLightSource/i22-bluesky/blob/1f0a00828b006388d1a56b0f426610ab8d7bfcdf/src/i22_bluesky/plans/stopflow.py#L59

Here is an example of how this was working in the i22-bluesky plans repository