This commit introduces newtype wrappers for `LocalSlot`, `UpvalueIdx`,
and `GlobalIdx` to improve type safety and clarity. These wrappers
replace direct use of `u32` for indices, making the code more robust and
easier to understand.
The changes include:
- Defining `LocalSlot`, `UpvalueIdx`, and `GlobalIdx` structs.
- Implementing `Display` for these new types to provide user-friendly
output.
- Updating the `Address` enum to use these new types.
- Modifying various compiler components (analyzer, binder, optimizer,
type checker, environment, VM) to use the new types.
- Adjusting tests to accommodate the changes.
Michael Schimmel