feat: 添加取模运算符支持，更新解析器、解释器、词法分析器和相关示例以处理相关语法

src/interpreter/interpreter.rs

@@ -314,6 +314,13 @@ impl Interpreter {
                             token: None,
                         }),
                     },
+                    crate::ast::expr::BinaryOp::Mod => match (l,r) {
+                        (Value::Number(a), Value::Number(b)) => Ok(Value::Number(a%b)),
+                        _ => Err(RuntimeError::RuntimeError {
+                            message: "Invalid '%' operands".to_string(),
+                            token: None,
+                        }),
+                    },
                     crate::ast::expr::BinaryOp::Greater => Ok(Value::Bool(self.as_number(&l)? > self.as_number(&r)?)),
                     crate::ast::expr::BinaryOp::GreaterEqual => Ok(Value::Bool(self.as_number(&l)? >= self.as_number(&r)?)),
                     crate::ast::expr::BinaryOp::Less => Ok(Value::Bool(self.as_number(&l)? < self.as_number(&r)?)),
@@ -443,6 +450,11 @@ impl Interpreter {
                 let right_num = self.as_number(&right)?;
                 Ok(Value::Number(left_num / right_num))
             }
+            AssignOp::PercentEqual => {
+                let left_num = self.as_number(&left)?;
+                let right_num = self.as_number(&right)?;
+                Ok(Value::Number(left_num % right_num))
+            }
         }
     }