[Feat]: Improved Web Component Support

[rubinda]

Description

When using your library, I've noticed that it's not functioning out-of-the-box for WebComponents, I've been testing it with lit.

The main issue is that due to Shadow DOM some CSS classes and variables do not get properly passed to the element if it's part of a nested web component.

Proposed solution

• classes show--consent and show--preferences could be toggled on the userConfig.root element
• CSS variables should also be instantiated for the :host selector

I've prepared #816 to demonstrate the proposed changes

Additional details

No response