chore(deps-dev): bump the dev-dependencies group across 1 directory with 4 updates

Bumps the dev-dependencies group with 4 updates in the / directory: [@ai-sdk/provider](https://github.com/vercel/ai/tree/HEAD/packages/provider), [@opencode-ai/sdk](https://github.com/sst/opencode-sdk-js), [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) and [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest).


Updates `@ai-sdk/provider` from 3.0.15 to 3.0.16
- [Release notes](https://github.com/vercel/ai/releases)
- [Changelog](https://github.com/vercel/ai/blob/@ai-sdk/provider@3.0.16/packages/provider/CHANGELOG.md)
- [Commits](https://github.com/vercel/ai/commits/@ai-sdk/provider@3.0.16/packages/provider)

Updates `@opencode-ai/sdk` from 1.18.30 to 1.18.31
- [Release notes](https://github.com/sst/opencode-sdk-js/releases)
- [Changelog](https://github.com/anomalyco/opencode-sdk-js/blob/main/CHANGELOG.md)
- [Commits](https://github.com/sst/opencode-sdk-js/commits)

Updates `@types/node` from 26.5.0 to 26.6.2
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Updates `vitest` from 5.0.0 to 5.0.1
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v5.0.1/packages/vitest)

---
updated-dependencies:
- dependency-name: "@ai-sdk/provider"
  dependency-version: 3.0.16
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: "@opencode-ai/sdk"
  dependency-version: 1.18.31
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
- dependency-name: "@types/node"
  dependency-version: 26.6.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: dev-dependencies
- dependency-name: vitest
  dependency-version: 5.0.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: dev-dependencies
...

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Author: dependabot[bot]