Proposal: Add Prefix to all components

[vinicius73]

We have some components like Button with native HTML elements. It should be avoided.
This is an official recommendation.

A prefix like NC looks reasonable.

<NCButton>FOO<NCButton/>
<nc-button>FOO<nc-button/>

This issue is related to #2959 this chance also turn ease see the difference between components, directives, and functions.

[raimund-schluessler]

Duplicate of #2643