Function patch_seq_string_join 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn patch_seq_string_join(stack: Stack) -> Stack

Join a list of strings with a separator.

Stack effect: ( Variant String – String )

Each element in the list is converted to its string representation and joined with the separator between them.

list-of "a" lv "b" lv "c" lv ", " string.join
# Result: "a, b, c"

Safety

Stack must have a String (separator) on top and a Variant (list) below