feat: Support Yolo v8 for import to LS

[smohan123]

Increase column width allowance for YOLO label outputs to accomodate prediction confidence scores

[smohan123]

@makseq Please take a look at this proposed fix for later versions of YOLO model prediction labels as per the code you supplied this morning.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 80.00000% with 1 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (master@240742a). Click here to learn what that means.

Files	Patch %	Lines
label_studio_converter/imports/yolo.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #286   +/-   ##
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  Coverage          ?   48.33%           
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  Files             ?       22           
  Lines             ?     1831           
  Branches          ?        0           
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  Hits              ?      885           
  Misses            ?      946           
  Partials          ?        0           

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