Get current used theme

[throrin19]

Clear and concise description of the problem

I want to integrate, in the wrapper, the current used theme in Histoire to switch my components themes to dark or light variation.

In my case, I use Vuetify and, if I can get the current theme, I can switch this directly using vuetify API and it's apply to all my components.

Suggested solution

Have a method or a property in the wrapper part to get current theme

Alternative

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct
• [X] Read the Contributing Guidelines.
• [X] Read the docs.
• [X] Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.