Dynamic CSS injection

[chrisvxd]

Currently, the user is responsible for importing the CSS. This means that Puck CSS commonly ends up in production CSS bundles for rendered pages, not just for pages containing Puck.

Instead, we should inject the CSS dynamically into the head when rendering the <Puck> component . This will prevent Puck CSS from ending up in the production CSS bundle.

Considerations

• The CSS will likely have to be bundled before importing, which may require a custom build pipeline and dev mode