Added macro to create enum with all languages at compile time

[cshjsc]

I didn't do it through the build.rs, but this works too.

[cshjsc]

A problem I found with this is that because there are too many languages on the menu, as it is now you cannot scroll and can't search either, so you just have the languages that fit on the screen. I think there's a way to solve that easily but I'm no expert with the tui library

[Builditluc]

as it is now you cannot scroll and can't search either

Yeah, I'm working on the search currently. Any view can be made scrollable by adding .scrollable() to it (see the commit I made in the main pr).