Find a way to deal with array assignability

[Alex23087]

In Perk, arrays are assignable. It is possible to write this code:

let a : [int] = [1,2,3];
let b := a;

However, in C this is not possible. We need to find a way to deal with this.

[Alex23087]

One idea would be to add a static initialization block that is executed automatically when the program is run. But since we want perk functions to be callable from C, it's not entirely clear how to enforce that it is called before any other function (without checking at each function call, which I would rather avoid)