Translator guide

Please provide a one-pager that explains how to start live translation and what translators can / should do.

• explain every ui-element (with text and images)
• explain the process for general use-cases, see #44 (closed)
• explain current shortcomings of the implementation
  • for example #31 (closed) !

implementation

this could be a separate page, which opens in a new tab from a link in the language-setup sidebar

the page could contain german and english version for now