Override/deduplicate meta heads in transformHead()

[Jinjiang]

Is your feature request related to a problem? Please describe.

I'd like to override <meta name="description"> for each page via transformHead()

https://vitepress.dev/reference/site-config#transformhead

How it only adds it. So there are 2 <meta description>s.

Describe the solution you'd like

I'd like to get a chance to remove or override the default <meta description> for a certain page.

Describe alternatives you've considered

Or having an option to disable the default <meta description>.

Additional context

Reproduction link: https://github.com/Jinjiang/reproductions/tree/vitepress-head-dedupe-20230728

Validations

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