feat: plate calibration widget

[tlambert03]

$ python examples/temp/plate_calibration_widget.py

todo:

• [x] calculate a1_origin and rotation from 2+ calibrated wells
• [x] give some feedback info on remaining wells
• [ ] allow knowledge of plate to constrain the well calibration (for example, rejecting a well calibration if it falls too far outside of the known radius/size of a well)
• [ ] ~implement testing logic, to go to a well (center/edge)~ (hid the widget instead)
• [x] add tests
• [x] double check units on the well calibration table

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 98.54369% with 3 lines in your changes missing coverage. Please review.

Project coverage is 90.85%. Comparing base (825c199) to head (26d8604). Report is 12 commits behind head on main.

Files with missing lines	Patch %	Lines
...ymmcore_widgets/useq_widgets/_well_plate_widget.py	92.85%	3 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #355 +/- ## ========================================== + Coverage 90.70% 90.85% +0.15% ========================================== Files 76 77 +1 Lines 8641 8816 +175 ========================================== + Hits 7838 8010 +172 - Misses 803 806 +3 ```

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[tlambert03]

ok @fdrgsp, this one is ready. Have a final look, let me know if you want anything changed, and feel free to merge otherwise

[fdrgsp]

@tlambert03 I love it!!!