[Feature Request] Mention Featue f.ex. within the autocomplete component or as a whole new component

[paulwer]

Problem to solve

Hey everyone, is it possible to add a feature for the autocomplete component, to mention other people and/or use commands within the input itself.

Proposed solution

Take a look here:
https://css-tricks.com/so-you-want-to-build-an-mention-autocomplete-feature/

Would be a great addition and a great unique featue as a whole.
An other idea could be to implement this within a component called editor, which can be more customised.

[KaelWD]

Duplicate of #6820