feat: 添加数组字面量和索引访问功能，更新解析器和解释器以支持数组操作

src/interpreter/mod.rs

@@ -19,6 +19,7 @@ pub enum Value {
     Bool(bool),
     Nil,
     Object(Rc<RefCell<HashMap<String, Value>>>),
+    Array(Rc<RefCell<Vec<Value>>>),
     Function(Rc<Function>),
     NativeFunction(NativeFn),
 }
@@ -31,6 +32,7 @@ impl std::fmt::Debug for Value {
             Value::Bool(b) => write!(f, "Bool({:?})", b),
             Value::Nil => write!(f, "Nil"),
             Value::Object(_) => write!(f, "Object(...)"),
+            Value::Array(_) => write!(f, "Array(...)"),
             Value::Function(_) => write!(f, "Function(...)"),
             Value::NativeFunction(_) => write!(f, "NativeFunction(...)"),
         }
@@ -52,6 +54,17 @@ impl fmt::Display for Value {
                 }
                 write!(f, "}}")
             },
+            Value::Array(arr) => {
+                let arr = arr.borrow();
+                write!(f, "[")?;
+                for (i, val) in arr.iter().enumerate() {
+                    if i > 0 {
+                        write!(f, ", ")?;
+                    }
+                    write!(f, "{}", val)?;
+                }
+                write!(f, "]")
+            },
             Value::Function(_) => write!(f, "<function>"),
             Value::NativeFunction(_) => write!(f, "<native function>"),
         }