Add stdin support with explicit opt-in flag#403

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A909M wants to merge 3 commits intolaravel:mainfrom

A909M:feat/stdin-support

Commits on Sep 30, 2025

feat: add support for formatting code from stdin (#390)

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feat: require explicit --stdin flag for stdin input
A909M
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Commits on Oct 9, 2025

feat: add stdin support with dash and stdin-filename option
A909M
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