Add CSS isolate capability

[drualcman]

Based in the idea from this thread I add capability to add the CSS isolated in the component.

Also I add NET8 like a target and testing.

[carlosgarciasilac]

I think this is a good implementation and would like to use this on a project. @conficient, any chance you could review this?

[conficient]

Will have a look

[orlandommb]

Hello ! im definitly in need of this, @conficient thank you for all of your work with this !