Add classes

[Lukeuke]

package test

pub class Person {
     // private
    Name string;
    Age i32;

    // public
    pub ctor(name string, age i32) {
        Name = name;
        Age = age;
    }
    
    pub Get() string {
         return Name + " " + Age;     
    }
}

using "test"

package main

var p = test::Person("foo", 42);
print(p.Get());

something like that, TBD.