interpreter library

1. dax package
2. documentation
3. interpreter.dart

dax package

1. Libraries
2. control_flow
3. dax
4. environment
5. error
6. expr
7. global_function
8. interpreter
9. lox_callable
10. lox_class
11. lox_function
12. lox_instance
13. parser
14. resolver
15. return
16. runtime_error
17. scanner
18. stack
19. stmt
20. token
21. token_type