[Feature] Add ability to use content-projection within go-panels

[jaredami]

What is the feature that you would like to propose?

Currently, the go-panel has a panelContent Input which accepts html, but in order for styles to be applied to that html we would need to set encapsulation: ViewEncapsulation.None on the component which renders the action sheet containing the go-panel. We should add the ability to use content projection within a go-panel so that we can just project html with classes into the panel.

Example:
This will enable us to have complex, styled content within go-panels similar to this: