fix: add get remove properties

src/rougail/convert.py

@@ -84,6 +84,12 @@ class Property:
     ) -> None:
         self._properties.setdefault(path, {})[property_] = value
 
+    def get(self, path: str) -> None:
+        return self._properties.setdefault(path, {})
+
+    def remove(self, path: str, property_: str) -> None:
+        del self._properties[path][property_]
+
     def __getitem__(
         self,
         path: str,