Add format class for Audacity extended label track, fix #213

[NickleDave]

• Add format class for Audacity extended label track, fix bbox annotation format: Audacity Extended LabelTrack #213. As suggested by @shaupert with an initial implementation in ENH: create a class AudacityBbox to be able to handle the non standard format with bbox #222. This format will have the shorthand string name 'aud-bbox'
• Rename existing format 'aud-txt' -> 'aud-seq' to clarify relationship to 'aud-bbox' (both use txt files)
• Make noxfile lint session match what GitHub Actions lint workflow does
• Other minor clean-ups

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.03 ⚠️

Comparison is base (38c7a68) 94.11% compared to head (d1b4572) 94.09%.

❗ Current head d1b4572 differs from pull request most recent head fdd1bf0. Consider uploading reports for the commit fdd1bf0 to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #226      +/-   ##
==========================================
- Coverage   94.11%   94.09%   -0.03%     
==========================================
  Files          39       41       +2     
  Lines        1462     1541      +79     
==========================================
+ Hits         1376     1450      +74     
- Misses         86       91       +5     

Impacted Files	Coverage Δ
noxfile.py	0.00% <0.00%> (ø)
tests/test_data.py	98.40% <0.00%> (-1.60%)	⬇️
tests/fixtures/__init__.py	100.00% <0.00%> (ø)
tests/test_formats/test_bbox/test_raven.py	100.00% <0.00%> (ø)
tests/test_formats/test_seq/test_audtxt.py
tests/fixtures/audtxt.py
tests/test_formats/test_seq/test_audseq.py	100.00% <0.00%> (ø)
tests/fixtures/audseq.py	88.88% <0.00%> (ø)
tests/test_formats/test_bbox/test_audbbox.py	100.00% <0.00%> (ø)
tests/fixtures/audbbox.py	88.88% <0.00%> (ø)

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[NickleDave]

@all-contributors please add @shaupert for code ideas

[allcontributors]

@NickleDave

I've put up a pull request to add @shaupert! 🎉