Update translations

I haven't updated jitsimeter in a few weeks, we still have some traffic, but some of the newer features in Jitsimeter have untranslated strings. I'm looking for help in translating as well as in maintaining the software.

Translations are just thrown in in the code of index.html file here (https://0xacab.org/faras/jitsimeter/-/blob/master/index.html). Every string is written multiple times with a different "lang" attribute for each language inside a span. This was a fast implementation, sorry. So if anyone is up to the task we should make a better implementation of translations.

If you just want to help translate, we're accepting merge requests or if you just want a list of strings to translate, just ask for it on the comments and I'll give you a list of the phrases of the software for your language and I'll send it to you.

Thanks.