Changes for supporting lint in MLC

[anandhu-eng]

Usage:

mlc lint script --tags=<tags>

sample output:

anandhus@Anandhus-MacBook-Air anandhu-eng@mlcflow % python3 -m mlc.main lint script --tags=download-and-extract
[<mlc.item.Item object at 0x103ad5010>]
Sorted YAML keys in /Users/anandhus/MLC/repos/anandhu-eng@mlperf-automations/script/download-and-extract/meta.yaml
[2025-07-15 12:36:27,135 lint.py:65 INFO] - Sorted YAML keys for download-and-extract
anandhus@Anandhus-MacBook-Air anandhu-eng@mlcflow % python3 -m mlc.main lint script --tags=detect,os           
[<mlc.item.Item object at 0x103070ec0>]
[2025-07-15 12:37:37,351 lint.py:68 INFO] - No YAML keys to be sorted for detect-os

ref: #160

[github-actions]

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