Setup vitest

[pawcoding]

Changes

Summary:
Brief description of what this PR does and why.

Issues

Related issues:

• Related to #789

Dependencies

Depends on:

• Depends on: #101 (if applicable)
• Depends on: pawcoding/astro-loader-pocketbase#102 (if applicable)

Testing

How to test:

1. Steps to test the changes
2. Expected behavior
3. Any specific scenarios to verify

Test coverage:

• Manual testing completed

Code Quality

Code review checklist:

• Code follows existing patterns and conventions
• Functions are small and focused
• Types are properly defined
• Error handling is appropriate
• Documentation is updated if needed

Breaking Changes

Are there any breaking changes?

• No breaking changes
• Yes, breaking changes (describe below)

Migration notes:
If there are breaking changes, provide migration instructions for users.

Additional Context

Screenshots/GIFs:
Add screenshots or GIFs if the changes affect the UI.

[pawcoding]

🎉 This PR is included in version 2.1.4-next.3 🎉

The release is available on:

• npm package (@next dist-tag)
• GitHub release

Your semantic-release bot 📦🚀