Add starting point for SmartEM integration

[d-j-hatton]

If installed and configured then starting a multigrid controller also adds an Acquisition in SmartEM and triggers the acquisition creation event.

The atlas context is expanded to behave differently under different acquisition software. In the case that SerialEM is being used it will "register" atlases that it sees, meaning they will be registered with SmartEM if installed and configured. The SerialEM context is not accessed by discovery at the moment, as the others are, but is explicitly set in the API calls that trigger the multigrid controller setup. Note this means that this context will be used for all atlas analysers spawned by that controller.

[codecov]

Codecov Report

❌ Patch coverage is 41.53846% with 38 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.81%. Comparing base (8824e87) to head (86bee44).
⚠️ Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #748      +/-   ##
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- Coverage   46.85%   46.81%   -0.05%     
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  Files          91       91              
  Lines        9692     9756      +64     
  Branches     1278     1287       +9     
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+ Hits         4541     4567      +26     
- Misses       4929     4966      +37     
- Partials      222      223       +1     

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