Add world_size property

src/robofish/io/file.py

@@ -201,6 +201,10 @@ class File(h5py.File):
             self["samplings"].attrs["default"] = self.default_sampling
         return name
 
+    @property
+    def world_size(self):
+        return self.attrs["world_size_cm"]
+
     @property
     def frequency(self):
         # NOTE: Only works if default sampling availabe and specified with frequency_hz.