feat: add Cairo

queries/cairo/folds.scm

@@ -0,0 +1,31 @@
+[
+  (mod_item)
+  (struct_item)
+  (trait_item)
+  (enum_item)
+  (impl_item)
+  (type_item)
+
+  (use_declaration)
+  (let_declaration)
+  (namespace_definition)
+
+  (arguments)
+  (implicit_arguments)
+  (tuple_type)
+
+  (import_statement)
+  (attribute_statement)
+  (with_statement)
+  (if_statement)
+
+  (function_definition)
+  (struct_definition)
+  (loop_expression)
+  (if_expression)
+  (match_expression)
+  (call_expression)
+  (tuple_expression)
+
+  (attribute_item)
+] @fold