Add github action to shellcheck master on push and PRs#3550

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yarikoptic wants to merge 3 commits intonipy:masterfrom

yarikoptic:enh-shellcheck

Commits on Feb 21, 2025

Add github action to shellcheck master on push and PRs

yarikoptic
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regenerate action: was broken, and insufficient grepping for related files

yarikoptic
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sty: Apply shellcheck diff
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