Switch to vue.js

[Griboedow]

We can skip OOUI and switch to vue.js at some point of time

Cuurently Mediawiki does not support "FileInput" in vue.js, so we are waiting for them to expand the list of components.

Can look like this:

[Griboedow]

https://www.mediawiki.org/wiki/Extension:CodexExample Can be used as a reference.

Here we can track which input types are supported https://www.mediawiki.org/wiki/Codex/Planned_Components