Enable coco format to import bbox annotations

[wonjuleee]

Summary

How to test

Checklist

• I have added unit tests to cover my changes.​
• I have added integration tests to cover my changes.​
• I have added the description of my changes into CHANGELOG.​
• I have updated the documentation accordingly

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.
• I have updated the license header for each file (see an example below).

# Copyright (C) 2024 Intel Corporation
#
# SPDX-License-Identifier: MIT

[codecov]

Codecov Report

Attention: Patch coverage is 60.00000% with 2 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (releases/2.0.0@97a83d7). Click here to learn what that means.

Files	Patch %	Lines
src/datumaro/plugins/data_formats/coco/base.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##             releases/2.0.0    #1360   +/-   ##
=================================================
  Coverage                  ?   80.85%           
=================================================
  Files                     ?      271           
  Lines                     ?    30678           
  Branches                  ?     6195           
=================================================
  Hits                      ?    24806           
  Misses                    ?     4488           
  Partials                  ?     1384           

Flag	Coverage Δ
ubuntu-20.04_Python-3.10	80.84% <60.00%> (?)
windows-2022_Python-3.10	80.83% <60.00%> (?)

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