chore: add vendored numeric-separators-style ESLint rule #202
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chore: add vendored numeric-separators-style ESLint rule
Vendored from eslint-plugin-unicorn to enforce readable numeric
literals with underscores (e.g., 1_000_000 instead of 1000000).
Adapted to use standard ESLint visitor pattern instead of unicorn's
internal context.on() API.
chore: apply numeric separator formatting to codebase
Auto-fixed by numeric-separators-style rule to improve readability
of large numeric literals (e.g., 1000000 → 1_000_000).