Clear and concise description of the problem

Layers cannot be individually excluded from @unocss at-rule.

Suggested solution

Currently, we can inject each layer individually using @unocss <layer-name> at-rule with the layer name, e.g.: @unocss preflights. This will replace the at-rule placeholder with only the generated preflights layer (and add the layer to the exclude list to not generate it again in the fallback @unocss at-rule).

I suggest being able to specify layers to be excluded in @unocss at-rule.
Maybe a syntax like: @unocss !<layer-name> ...

Example

This should generate all the rules, except the preflights layer:

@unocss !preflights;
@unocss;

Alternative

No response

Additional context

I'm trying to separate the properties layer from the rest of the styles into a file (ref: presetWind4).

File: properties.css

@unocss properties;

File: style.css

@unocss;

File: main.ts

...
import "./properties.css"
import "./style.css"
...

But the @unocss at-rule only operates at the file-level; So, it won't exclude the properties layer specified in another file.

With this proposal, I can adjust the style.css file to be like this, and it should work:

@unocss !properties;
@unocss;

Validations

• Read the Contributing Guidelines.
• Read the README.md of using the package.
• Already used the Interactive Docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.