Add deepmerge util

stgpytools/functions/__init__.py

@@ -1,2 +1,3 @@
 from .funcs import *  # noqa: F401, F403
 from .normalize import *  # noqa: F401, F403
+from .other import *  # noqa: F401, F403

stgpytools/functions/other.py

@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from typing import Any
+
+__all__ = [
+    'deepmerge'
+]
+
+
+def deepmerge(source: dict[Any, Any], destination: dict[Any, Any]) -> dict[Any, Any]:
+    for key, value in source.items():
+        if isinstance(value, dict):
+            node = destination.setdefault(key, {})
+            deepmerge(value, node)
+        else:
+            destination[key] = value
+
+    return destination