Rename test workflow to 'Tests'

[sydneyrenee]

Summary

Rename the test workflow to Tests so it matches the Title Case style of the other workflows (CI, Build, Publish, CodeQL Advanced) and reads clearly in the Actions tab.

• Top-level name: test -> name: Tests.
• Job label test (<os>) -> Tests (<os>).
• Add a run-name for consistency with CI / CodeQL Advanced.

Not a removal: this workflow is the only thing running the actual test suites (bun turbo test on linux, Playwright test:e2e:local on windows). ci.yml only does verification builds, so the two are complementary.

Note

No branch protection currently references the old test (linux) / test (windows) check names, so renaming won't orphan a required status check. If/when we add branch protection, point required checks at Tests (linux) / Tests (windows).

Test plan

• PR shows Tests (linux) and Tests (windows) checks, both green.

[gemini-code-assist]

Note

Gemini is unable to generate a review for this pull request due to the file types involved not being currently supported.