docs: Highlight that the first theme becomes the default

[EnGassa]

On which page do you see this issue?

https://daisyui.com/docs/config/#themes

Describe the issue

The text the first theme will be the default theme ought to be highlighted. I ended up wasting so much time trying to debug a misbehaving theme because this information is buried in the last sub-sentence of the doc on themes. Sure, it is my fault for not noticing this information there, however, it would help future devs to call this information out. Happy to push a PR for this if it helps.

What browsers are you seeing the problem on?

No response

[github-actions[bot]]

Thank you @EnGassa for reporting issues. It helps daisyUI a lot 💚
I'll be working on issues one by one. I will help with this one as soon as a I find a solution.
In the meantime providing more details and reproduction links would be helpful.

[saadeghi]

I understand.
But which theme was expected to be default? Let's say we have themes: ["light", "dark", "cupcake"], I think it's obvious the first one is going to applied.

Also, this can happen to any other part of the docs. Someone may say If it's true, all themes will be included must be highlighted cuz they didn't read it.