Add Unicode Support

[ndd7xv]

Suggested in a Reddit comment, but putting it here if there are any ideas.

I think it'll be complicated to do this, and I don't think many hex editors support Unicode. Many files inspected with a hex editor (such as binaries or specific file formats) often have random bytes that are not ASCII printable but also not Unicode. Thus, there probably needs to be a way to differentiate between a byte stream that can represent Unicode and just a byte stream that's random bytes.

There may also be other concerns that aren't coming to mind right now.