Allow tuple location key

[cmalinmayor]

Proposed Change

Allow a tuple location key when creating a napari tracks layer from a networkx graph

Checklist

Go through these things before merge. Actions should run automatically to test them, but for information on how to run locally, see CONTRIBUTING.md.

• I have added tests that prove that my feature works in various situations or tests the bugfix (if applicable).
• I have checked that the tests pass and I maintained or improved test coverage (if applicable).
• I have written docstrings and checked that they render correctly in the documentation build.
• I have checked that mypy type checking passes.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 16.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 86.88%. Comparing base (2d69e99) to head (ddb1c17).

Files	Patch %	Lines
src/motile_toolbox/visualization/napari_utils.py	16.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
- Coverage   87.05%   86.88%   -0.18%     
==========================================
  Files          14       14              
  Lines         425      427       +2     
==========================================
+ Hits          370      371       +1     
- Misses         55       56       +1     

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