Add dimensionality inference when converting to napari layer

[quantumjot]

Relates to https://github.com/lowe-lab-ucl/napari-btrack/issues/52

This lets the napari reader try to infer whether the data are 2D or 3D, based on the data in the file. It was previously hard-coded into the reader:

https://github.com/quantumjot/BayesianTracker/blob/8139868c06ba9ac4754299494cb49a7bf3160d5a/btrack/napari/reader.py#L82

It might be an idea to store this as an HDF5 attribute at some point, but in lieu of that this will work.

Also added a quick test to check the inference works.

[deprecated-napari-hub-preview-bot[bot]]

Preview page for your plugin is ready here: https://preview.napari-hub.org/quantumjot/BayesianTracker/205 Updated: 2023-03-08T19:16:51.200481

[codecov-commenter]

Codecov Report

Patch coverage: 85.71% and project coverage change: +0.03 :tada:

Comparison is base (20d504e) 88.54% compared to head (90ce3ce) 88.58%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #205 +/- ## ========================================== + Coverage 88.54% 88.58% +0.03% ========================================== Files 19 19 Lines 1519 1524 +5 ========================================== + Hits 1345 1350 +5 Misses 174 174 ``` | [Impacted Files](https://codecov.io/gh/quantumjot/BayesianTracker/pull/205?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe) | Coverage Δ | | |---|---|---| | [btrack/napari/reader.py](https://codecov.io/gh/quantumjot/BayesianTracker/pull/205?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe#diff-YnRyYWNrL25hcGFyaS9yZWFkZXIucHk=) | `80.00% <0.00%> (ø)` | | | [btrack/core.py](https://codecov.io/gh/quantumjot/BayesianTracker/pull/205?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe#diff-YnRyYWNrL2NvcmUucHk=) | `88.68% <100.00%> (+0.10%)` | :arrow_up: | | [btrack/utils.py](https://codecov.io/gh/quantumjot/BayesianTracker/pull/205?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe#diff-YnRyYWNrL3V0aWxzLnB5) | `92.30% <100.00%> (+0.22%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alan+R+Lowe)

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