feat: add AST checker engine framework with 9 Phase 1 engines

ast_checker/engines/operator.py

@@ -0,0 +1,10 @@
+from .base import BaseEngine
+
+
+class MustUseOperatorEngine(BaseEngine):
+    def check(self, tree, rule, language, mapping):
+        target = rule["target"]
+        mapped_op = mapping.get(target, target)
+        if not self.has_node(tree.root_node, mapped_op):
+            return [rule.get("message", f"必须使用 {target} 运算符")]
+        return []