Create batch file to call buck2.py

Summary: TSIA, so that we can call `.\buck2` from CLI on Windows, otherwise we have to do `fbpython buck2.py`. Just a utility script.

Reviewed By: jrodal98

Differential Revision: D66401867

fbshipit-source-id: 4cb82eef3b2535a703a7a20850383e1fda529cb5

buck2.bat

@@ -0,0 +1,9 @@
+@REM Copyright (c) Meta Platforms, Inc. and affiliates.
+@REM
+@REM This source code is licensed under both the MIT license found in the
+@REM LICENSE-MIT file in the root directory of this source tree and the Apache
+@REM License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+@REM of this source tree.
+
+@echo off
+fbpython "%~dp0buck2.py" %*