feat: __repr__ method for RefExpr and NameExpr

The addition of these 2 simple reprs was helpful for me for debugging a compiler issue locally

Author: BobTheBuidler

mypy/nodes.py

@@ -1912,6 +1912,9 @@ def __init__(self) -> None:
         # And same for TypeIs
         self.type_is: mypy.types.Type | None = None
 
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} fullname={self.fullname} of {self.node} object at {hex(id(self))}>"
+
     @property
     def fullname(self) -> str:
         return self._fullname
@@ -1937,6 +1940,9 @@ def __init__(self, name: str) -> None:
         # Is this a l.h.s. of a special form assignment like typed dict or type variable?
         self.is_special_form = False
 
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} fullname={self.fullname} special_form={self.is_special_form} of {self.node} object at {hex(id(self))}>"
+
     def accept(self, visitor: ExpressionVisitor[T]) -> T:
         return visitor.visit_name_expr(self)