"add translation" button for glossary entries and terminology modules

[kohlhase]

As support for translation, it would be good if we could add a "add" button to the language links

on the right upperhand corner.
Analogously, the terminology modules (e.g. https://mathhub.info/smglom/mv/argseq.omdoc) should have a "add translation" button.

This "add"/"add translation" button should lead do a dialog that allows to add a translation. Now, what this means is not quite clear in the presence of permissions. There are a couple of things that are possible:

• if the user has write permissions to the archive, then we should just run lmh transate (see \hasprop{x} gives english words in translation Legacy-localmh#241, Pre-translate technical terms in lmh translate Legacy-localmh#132, Use the symbo2verbalization mapping in lmh translate Legacy-localmh#218) on this and generate a buffer in the MathHub UI for that that can then be edited and directly committed. For this a preview functionality (pdf or HTML) would be great.
• if the user does not have write permissions, then we probably have to fork the repository first and generate a pull request.