feat(physics): wire physx sdk into build

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

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+# 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.
+
+set -e
+
+PACKMAN_CMD="$(dirname "${BASH_SOURCE}")/packman"
+if [ ! -f "$PACKMAN_CMD" ]; then
+    PACKMAN_CMD="${PACKMAN_CMD}.sh"
+fi
+source "$PACKMAN_CMD" init
+export PYTHONPATH="${PM_MODULE_DIR}:${PYTHONPATH}"
+
+if [ -z "${PYTHONNOUSERSITE:-}" ]; then
+    export PYTHONNOUSERSITE=1
+fi
+
+# For performance, default to unbuffered; however, allow overriding via
+# PYTHONUNBUFFERED=0 since PYTHONUNBUFFERED on windows can truncate output
+# when printing long strings
+if [ -z "${PYTHONUNBUFFERED:-}" ]; then
+    export PYTHONUNBUFFERED=1
+fi
+
+# workaround for our python not shipping with certs
+if [[ -z ${SSL_CERT_DIR:-} ]]; then
+    export SSL_CERT_DIR=/etc/ssl/certs/
+fi
+
+"${PM_PYTHON}" "$@"