[rlox] Add line information to chunk

rlox/src/main.rs

@@ -2,6 +2,8 @@ mod vm;
 
 fn main() {
     let mut chunk = vm::Chunk::new("TEST".to_string());
-    chunk.add(vm::Op::Return);
+    chunk.add_op(vm::Op::Return, 1);
+    chunk.add_op(vm::Op::Constant { offset: 0 }, 1);
+    chunk.add_constant(vm::Value::from(3.14));
     println!("{:?}", chunk);
 }