add internationalization to event form
issue: translation (internationalization) is only implemented on homepage yet. Internationalization is not implemented on event form yet.
goal: implement internationalization (english / german translation) to event form based on initialization already implemented on homepage
https://stempelheft.multimediatechnology.at/events/new -\> implement I18n in files: new.html.erb & \_form.html -\> update en.yml and de.yml -\> adjust unit tests and system test if needed
**BEFORE:** (based on internationalization initialization)
german version contains english:
{width="320" height="340"} {width="277" height="340"}
english version contains german:
{width="271" height="237"}
internationalization of homepage is already implemented on staging
{width="403" height="278"}
**After**
english:
{width="339" height="403"} {width="361" height="401"}
german:
{width="481" height="310"} {width="253" height="308"}
issue