chore: import upstream snapshot with attribution

showcase/shared/python/tools/roll_dice.py

@@ -0,0 +1,13 @@
+"""Dice-rolling tool implementation."""
+
+import random
+from typing import Any
+
+
+def roll_dice_impl(sides: int) -> dict[str, Any]:
+    """Roll a die with the given number of sides.
+
+    Returns a dict with the requested ``sides`` and the rolled ``result``
+    (a random integer in ``[1, sides]``).
+    """
+    return {"sides": sides, "result": random.randint(1, sides)}