Read annotations in VIA or COCO format as dataframe

[sfmig]

Rebase after PR #20

Description

What is this PR

• Bug fix
• Addition of a new feature
• Other

Why is this PR needed?

What does this PR do?

• Adds data loaders to read them as dataframes
• Adds datasets validators!
• Add tests for data loaders

References

Please reference any existing issues/PRs that relate to this PR.

How has this PR been tested?

Please explain how any new code has been tested, and how you have ensured that no existing functionality has changed.

Is this a breaking change?

If this PR breaks any existing functionality, please explain how and why.

Does this PR require an update to the documentation?

If any features have changed, or have been added. Please explain how the
documentation has been updated.

Checklist:

• The code has been tested locally
• Tests have been added to cover all new functionality
• The documentation has been updated to reflect any changes
• The code has been formatted with pre-commit

[codecov]

Codecov Report

Attention: Patch coverage is 54.31034% with 53 lines in your changes missing coverage. Please review.

Project coverage is 54.54%. Comparing base (ed93738) to head (ce3257b).

Files with missing lines	Patch %	Lines
ethology/annotations/io.py	0.00%	53 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            main      #21       +/-   ##
==========================================
+ Coverage   0.00%   54.54%   +54.54%     
==========================================
  Files          1        4        +3     
  Lines          5      121      +116     
==========================================
+ Hits           0       66       +66     
- Misses         5       55       +50     

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