feat(playwright): allow providing default test options

[GaborTorma]

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

If we configure nuxt object in playwright.config.ts projects and later use test.use with nuxt options. The test.use nuxt options overwrite the playwright.config.ts projects config, not merging.
I intruduce a new defaults options with nuxt property, that we can use in playwright.config.ts projects to merging it with test.use nuxt options.

Example usage in my playwright.config.ts and client.test.ts files in nuxt-feathers module.

[danielroe]

(no need to merge unless there's a conflict - I can always do it - and it tends to delay me as I have to approve rerunning the tests again.)