Michael Schimmel
7042206ab6
Adds a new `Binder` struct that traverses the AST and resolves variable references to concrete `Address` types (Local, Upvalue, Global). This information is crucial for the Virtual Machine's execution phase. Introduces the `BoundKind` enum to represent the AST after binding. The `VM` is updated to handle `BoundKind` nodes and execute the bound AST. It now manages a call stack, local variables, and closures for function calls and upvalue capturing. The `Environment` struct is enhanced to manage global variables and provide a unified interface for parsing, binding, and executing scripts. It also includes basic standard library functions.