Add cookie attributes

[tasiotas]

🔗 Linked issue

none

❓ 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

I added cookieAttribsto the module config. This allows to specify any cookie attribute for further configuration. Now we can specify path, domain etc. so that color-mode works across subdomains.

Thank you

[netlify]

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