feat(physics): wire physx sdk into build

engine/third_party/physx/buildtools/packman/python.bat

@@ -0,0 +1,32 @@
+:: Copyright 2019-2025 NVIDIA CORPORATION
+::
+:: Licensed under the Apache License, Version 2.0 (the "License");
+:: you may not use this file except in compliance with the License.
+:: You may obtain a copy of the License at
+::
+::    http://www.apache.org/licenses/LICENSE-2.0
+::
+:: Unless required by applicable law or agreed to in writing, software
+:: distributed under the License is distributed on an "AS IS" BASIS,
+:: WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+:: See the License for the specific language governing permissions and
+:: limitations under the License.
+
+@echo off
+setlocal enableextensions
+
+call "%~dp0\packman" init
+set "PYTHONPATH=%PM_MODULE_DIR%;%PYTHONPATH%"
+
+if not defined PYTHONNOUSERSITE (
+    set PYTHONNOUSERSITE=1
+)
+
+REM For performance, default to unbuffered; however, allow overriding via
+REM PYTHONUNBUFFERED=0 since PYTHONUNBUFFERED on windows can truncate output
+REM when printing long strings
+if not defined PYTHONUNBUFFERED (
+    set PYTHONUNBUFFERED=1
+)
+
+"%PM_PYTHON%" %*