fix: failed to check inside github action

[hyoban]

Fixes voidzero-dev/setup-vp#7

I'm unsure whether we can produce good terminal output while retaining the GitHub reporter. If my fix is off course, please feel free to close this PR.

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[fengmk2]

This fix looks feasible, but it loses the advantage of oxlint's special customized report output on GitHub Actions.
We need to see if there's any way to make oxlint's customized reports work together with the vp check command

[fengmk2]

@Boshen I will first merge this fix to address the current issue where the vp check command is unavailable. Then I'll submit an issue to follow up on a better solution.

[Copilot]

Pull request overview

This PR fixes vp check behaving incorrectly under GitHub Actions by ensuring oxlint emits the human-readable summary that vp check parses, and adds a snapshot test covering the GitHub Actions environment.

Changes:

• Force oxlint to use the default formatter during vp check linting to keep parseable/stable summary output even when GITHUB_ACTIONS=true.
• Add a new snap-test case that runs vp check with GITHUB_ACTIONS=true to prevent regressions.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/cli/binding/src/cli.rs	Forces vp check’s lint step to pass --format=default to oxlint so summary parsing works in GitHub Actions.
packages/cli/snap-tests/check-pass-typecheck-github-actions/vite.config.ts	New snap-test config enabling type-aware/type-check linting.
packages/cli/snap-tests/check-pass-typecheck-github-actions/steps.json	New snap-test steps setting GITHUB_ACTIONS=true and running vp check.
packages/cli/snap-tests/check-pass-typecheck-github-actions/src/index.js	New minimal source file for the snap-test fixture.
packages/cli/snap-tests/check-pass-typecheck-github-actions/snap.txt	Expected snapshot output for the GitHub Actions scenario.
packages/cli/snap-tests/check-pass-typecheck-github-actions/package.json	New snap-test fixture package manifest.

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