Type-In Compatibility (v1.2)

After watching a video about old BASIC coding magazines and looking at some of those old magazines myself (see https://usborne.com/gb/books/computer-and-coding-books), I figured that there is not much missing for my app in order to be compatible with those type in games.  Most notably my basic did not support the "input" command yet, which made it hard to get useful user input.

So with Version 3.0 I added the "input" function as well as some other useful functions and a few bug fixes, which now should make it compatible with most of those old type-in games, as long as they are compatible with the commodore pet.