Added logic to FIBContext for Analyser to register FIB atlas images and associated metadata

[tieneupin]

This is the first of a series of PRs to register and trigger processing for images and metadata in the FIB workflow. This PR focuses on adding logic to the client to look for specific files and extract the relevant metadata from them, before subsequently passing these files to the backend, which will be implemented in a future PR.

The FIB workflow can potentially take data from three types of acquisition software: AutoTEM, Maps, and Meteor. Separate if-else blocks have been added to the FIBContext's post_transfer() function that will decide how the incoming files being read are handled.

Additionally, the main Analyser function was slightly tidied up so that checks to determine the different contexts to use are grouped under the same conditional.

[codecov]

Codecov Report

❌ Patch coverage is 73.19588% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 48.41%. Comparing base (0447842) to head (790cac8).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #758      +/-   ##
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+ Coverage   47.95%   48.41%   +0.46%     
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  Files          91       91              
  Lines        9974    10062      +88     
  Branches     1290     1310      +20     
==========================================
+ Hits         4783     4872      +89     
+ Misses       4968     4954      -14     
- Partials      223      236      +13     

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