TODO: use this

A block will go through this function and end up like this: { a := 42; a + 5; } {expr} block {stmt} expr {expr} binary add {expr} 5 {expr} local

Compiles a Capy function into a Cranelift function. The main function to look at here is `compile_expr` or `compile_expr_with_args`

Note: this is "global" as in "global variable," not global as in "including everything from all over the project". the project-wide struct which hold