feat: How to deal with the repo items without any label inside of index.yml files?

[birdflyi]

Agree with the opinion: the index.yml files in labeled_data should only have labels.

Disscusstion Referenced:

• Fix Bug: Correct labels of yaml files in labeled_data directory. #1487 (comment)
• Fix Bug: Correct labels of yaml files in labeled_data directory. #1487 (comment)

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          Are all the repos below can not be assigned to any above categories? I think they should be set to above categories since there is an `other` sub field.

I think the best way to do this is that Application should only have labels, all the orgs or repos should be in sub labels.

Originally posted by @frank-zsy in #1487 (comment)

[open-digger-bot]

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