Consider adding char as a primitive type

[mohammadfawaz]

Similar to https://doc.rust-lang.org/book/ch03-02-data-types.html#the-character-type

This would be useful for the String library that is being developed. For example, the push function would look like:

fn push(mut self, value: char)

[adlerjohn]

Shower thought: chars are just one-element strings, so anywhere a char is used, a string can be used.

[otrho]

char would be a copy type and str is a ref type so internally they'd be treated quite differently. Might make substituting chars for strings non-trivial.

[Centril]

If we wish to have unicode support for our strings, I think this is a great idea / must-have.

Shower thought: chars are just one-element strings, so anywhere a char is used, a string can be used.

For unicode purposes, this doesn't work. str[N] is based on the number of bytes, but chars would be treated in memory as u32 (+ special rules) to back the possibility of emojis and such.