feat(useColorMode): disableTransition support pseudo-elements

[lainbo]

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Description

pseudo-elements can also be used to apply various styles and effects. When switching between light and dark themes, the disableTransition parameter should control the disabling of transitions on pseudo-elements as well

Additional context

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🤖 Generated by Copilot at af367dc

Fixed flashing elements bug during color mode change by updating the style string for disabling transitions in useColorMode to cover pseudo-elements. Improved style string readability with template literals and multiline strings.

🤖 Generated by Copilot at af367dc

• Update the style string for disabling transitions to include pseudo-elements (link)
• Format the style string using template literals and multiline strings for readability (link)

[antfu]

Please keep it minified, as this is a string literal and the minifier won't do it.