Add MIBI tiling script

[alex-l-kong]

What is the purpose of this PR?

Begins addressing #413. We start by adding a tiling script to ark allowing users to generate tiled regions across fovs for a given run.

How did you implement your changes

We add example_fov_grid_generate.ipynb, which runs the tiling process. A new repo, ark/mibi, will contain helper functions. So far, only tiling_utils.py has been added to encapsulate the tiling process.

Additionally, sample JSON data has been added to data/example_dataset.

Remaining issues

Testing still needs to be addressed.

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[alex-l-kong]

The tests have yet to be added in, but I would appreciate an initial review of the overall structure. I'll begin tagging Erin on this PR after more progress.

[ngreenwald]

Good start, see below for some initial comments

[alex-l-kong]

I'm researching ways to test set_tiling_params because those require input arguments from the user. In the meantime, a test for create_tiled_regions has been added.

UPDATE: the monkeypatch feature of pytest provides a nice way to handle this.

[ngreenwald]

Looks good, some more tweaks

[ngreenwald]

Looks good. The testing needs to be refactored.

[ackagel]

Just some thoughts on the tiling_params structure. Agree with Noah's point on condensing/generalizing the test functions.

[bcollica]

Just minor stuff

[bcollica]

Looks amazing! My only thought would be that set_tiling_params() is a bit long at 125 lines, mostly due to the repetitive nature of the calls to read_tiling_param(). Breaking those calls out as their own separate functions might help condense it, but not sure if it's really worth the trouble?

[ngreenwald]

Looks good!