Finish Chapter 16

Implement basic parsing / scanner

Signed-off-by: Daniel Henry <iamdanhenry@gmail.com>

README.md

@@ -22,20 +22,16 @@ make debug
 make bear
 ```
 
-## Run (current behavior)
-
-The current `main` builds a tiny test chunk and disassembles it—there’s no REPL or script runner yet.
+## Usage
 
+Run a file
 ```sh
-./bin/clox
+clox [file]
 ```
 
-Example output:
-
-```
-== test chunk ==
-0000  123 OP_CONSTANT    0 '1.2'
-0002   | OP_RETURN
+Run Repl
+```sh
+clox
 ```
 
 ## Layout
@@ -47,12 +43,3 @@ obj/       # build objects (generated)
 bin/       # executable output (generated)
 ```
 
-## Notes
-
-- Tracks the book’s **clox** implementation; commits may follow chapters.
-- `compile_commands.json` can be generated via `make bear` for editor tooling.
-
-## License
-
-Private / for learning.
-