Brummel
af8fb5cb7f
Introduced `scope_depth` to the `Binder` to track block nesting. This allows for correctly determining whether a `def` binding should be `Address::Global` (at scope depth 0) or `Address::Local`. The `type_checker` was also updated to handle `Program` and `Block` nodes by creating a new `TypeContext` for them. Removed the `wrap_as_lambda` method from `Environment` as the compiler now always produces a `Program` node, effectively handling the wrapping at the AST level. Correspondingly, `instantiate` and `run_script_compiled` were simplified to directly run the `Program` node.