Deprecate Web Component
According to [HTML5 sepc](https://html.spec.whatwg.org/multipage/dom.html#elements) one should not use custom elements.
This can lead to undefined behaviour and should generally be discouraged. Not to mention it requires JS to function.

The usage of the Web Component should be deprecated or **at least** visibly marked as an alternative in the docs.
The default should be the font with `<i>` tags which is widely used by many icon packs.