Function intrinsic_char_code 

pub fn intrinsic_char_code(
    _args: &[KindedSlot],
    _ctx: &mut ExecutionContext,
) -> Result<KindedSlot>

Intrinsic: Get the Unicode code point of a single character.

Migration deferred pending multi-input-type dispatch sub-decision. HeapValue::Char is first-class post-bulldozer; dropping the as_char branch would break for c in s.chars()-style consumers.