Added Italian translations for launcher and template

I completely translated both the launcher and the template to Italian.

I did it without using any machine translation tools (I am a native Italian speaker) and I tried to keep it accurate, gender-neutral and yet idiomatic - I did not stray semantically from the original text but I tried to use Italian terms and expressions whenever possible. Many things (very few of them, actually) did not have a direct equivalent in Italian so I left those unchanged - Launcher is one of them, for example, as the literal translation "lanciatore" is rarely heard in a software context (it usually either means "missile launcher" or "baseball pitcher") any non-standard lingo would only lead to confusion.

I tried the translation in Ren'Py 6.17.6.512 and it loaded, worked and played correctly. If you have any questions, just ask.