Matrix lint workflow by hook stage

[adamtheturtle]

Refactor the lint workflow to parallelize hook stage execution by adding hook-stage to the build matrix. This runs all three hook stages (pre-commit, pre-push, manual) in parallel instead of sequentially.

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Note

Low Risk
CI-only change that adjusts how linting jobs are parallelized; primary risk is longer job fan-out or misconfigured matrix leading to missing/duplicated checks.

Overview
Refactors the GitHub Actions Lint workflow to run prek by hook-stage via a new matrix axis (pre-commit, pre-push, manual) instead of executing all three stages sequentially in a single job.

Updates the lint step to use the matrix-provided stage in the command, increasing parallelism across OS+stage combinations while keeping existing Windows SKIP behavior and post-run pre-commit-ci/lite-action reporting.

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