fix: declare vitest dependency

[morgan-coded]

evalite imports from vitest at runtime, but the published package did not declare vitest, so strict pnpm/no-hoist installs could fail resolution. This declares vitest in the Evalite package dependencies, while leaving the existing Vitest utility packages and peer dependencies unchanged. I added a manifest assertion that failed before the dependency was declared, then ran pnpm run build:evalite, pnpm --filter evalite test -- src/command.test.ts, pnpm --filter evalite-tests test -- tests/basics.test.ts, typecheck, lint, format, and pnpm run ci.

Fixes #398

[changeset-bot]

🦋 Changeset detected

Latest commit: 911f43e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
evalite	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

@morgan-coded is attempting to deploy a commit to the Skill Recordings Team on Vercel.

A member of the Team first needs to authorize it.

[Copilot]

Copilot was unable to review this pull request because the user who requested the review has reached their quota limit.