PEARL - Diamond Anvil Cell (DAC) alignment

As an instrument scientist on PEARL, I would like to be able to quickly align a Diamond Anvil Cell.

- DAC alignment consists of aligning 7 independent axes:
- x, y, z position of collimator
- x, y, z for DAC (position Diamond Anvil Cell)
- Omega (rotation of Diamond Anvil Cell)
- All relevant axes are galil-controlled
- The 7 axes are aligned in sequence (perhaps iteratively, e.g. all coarse scans and then all fine scans), no multi-dimensional scans are needed
- Each scan is 10-15 points long, measuring a handful of seconds at each point. Period-per-point mode will likely be most appropriate, without saving DAE `.nxs` files.
- Adaptive scans may be useful, scan ranges can be quite big, this is currently done with manual iteration
- Detector is the transmission monitor (single spectrum)
- Monitor is an incident monitor (single spectrum)
- No ToF/wavelength chopping is required
- All relevant scans will produce data that can be fitted using a Gaussian model
- Ideally they might like to tie all of these scans together into an "autoalign" plan - but they don't currently know whether this will work because it hasn't been tried.
- The exact order which is best to align the axes is unknown and will need trying on the beamline.
- Testing time provisionally scheduled for upcoming cycle

### Acceptance criteria

I think we already have the functionality to do all of these things in `ibex_bluesky_core` - so the acceptance criteria of this ticket just become:

- [ ] Prepare the outline of an inst-level plan for PEARL, ready for testing next cycle
- [ ] Go to PEARL on the nominated day and test it
* Note: Craig/Nick said they would schedule a day, but haven't yet. Suggest that whoever picks up this ticket chases them to confirm a day.