Set up the initial directory structure for the rewrite of SilverMUD.
- data/ - Stores any multi-media or binary assets.
- documentation/ - Contains user-facing documentation for any programs in the repository.
- lisp/ - Contains Scheme source files.
- notes/ - Contains developer-facing documentation and design documents.
- source/ - Contains C source files.
- tests/ - Contains any tests for any programs in the repository.
