feat(vscode): If uno.root is not set, auto-detection

[Simon-He95]

With the popularity of monorepo, more and more libraries may use this mode, but it is very troublesome to configure settings.json additionally. I hope to automate changes more intelligently based on the unocss.config of my current project. #3106 #3034 #3009 #2742 #3000

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[antfu]

Also I don't think we should completely remove the unocss.root support, we could have this as a smart default when root is not specified, but keep the original behaviour without breaking change.

[Simon-He95]

Also I don't think we should completely remove the unocss.root support, we could have this as a smart default when root is not specified, but keep the original behaviour without breaking change.

Thank you for your review, I made some adjustments, please help to check it out

[Simon-He95]

Do you think it is necessary for us to monitor the file name changes or new creations of uno.config?

[antfu]

Nice work! Thanks