[robotpy] Mirror robotpy's commands-v2 (#8369)

Project import generated by Copybara.

GitOrigin-RevId: 715c8e8372d936f447f2937aab6b1a22dc619126

commandsv2/src/main/python/commands2/util.py

@@ -0,0 +1,25 @@
+# notrack
+from __future__ import annotations
+
+from typing import Iterable, List, Tuple, Union
+
+from .command import Command
+
+
+def flatten_args_commands(
+    *commands: Union[Command, Iterable[Command]]
+) -> Tuple[Command, ...]:
+    flattened_commands: List[Command] = []
+    for command in commands:
+        if isinstance(command, Command):
+            flattened_commands.append(command)
+        elif isinstance(command, Iterable):
+            flattened_commands.extend(flatten_args_commands(*command))
+    return tuple(flattened_commands)
+
+
+def format_args_kwargs(*args, **kwargs) -> str:
+    return ", ".join(
+        [repr(arg) for arg in args]
+        + [f"{key}={repr(value)}" for key, value in kwargs.items()]
+    )