feat: add `disableTransition` option and set default to `true`

[zcf0508]

Reference:

https://vueuse.org/core/useColorMode/ https://paco.me/writing/disable-theme-transitions

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[antfu]

I am a bit hesitate if this should be enabled by default. Would love to have some feedback from the community.

[antfu]

I think it might be better to have it default to false for now, so we can move forward. Later we could revise the defaults on the next major

[zcf0508]

I think it might be better to have it default to false for now, so we can move forward. Later we could revise the defaults on the next major

OK, I think it is better too.

[hacknug]

Perhaps default could come from @media/prefers-reduced-motion and then config allows you to force enable/disable.

In case it counts, I'd prefer transitions to be disabled by default.

[fos7er]

I'm looking forward for this feature