Documentation: Add notice that cookie size is limited to 4096 bytes

[Wafje]

Clear and concise description of the problem

Using Nuxt, pinia-plugin-persistedstate defaults to Cookies.
As cookie size is limited to 4096 bytes; when the store contains to much information, no cookie will be set.

Suggested solution

Add notice to documentation about this limitation

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[Wafje]

This one scratched my head for a couple of hours.

[Jao8]

That would be great! I lost a lot of time trying to understand why a specific store wasn't persisting, and if it hadn't been for this issue, I would still be pursuing it.