Add a new utils.algorithms file for code helpers.

The first helper, recursive_apply, goes through recursive dict/lists to apply a function on non-recursable types

src/utils/algorithms.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python3
+
+from typing import Any, Callable
+
+
+def recursive_apply(function: Callable, data: Any) -> Any:
+    if isinstance(data, dict):  # FIXME: hashable?
+        return {key: recursive_apply(value, function) for key, value in data.items()}
+
+    if isinstance(data, list):  # FIXME: iterable?
+        return [recursive_apply(value, function) for value in data]
+
+    return function(data)