chore: import upstream snapshot with attribution

tests/scripts/task_unit_test.bat

@@ -0,0 +1,21 @@
+@ECHO OFF
+SETLOCAL EnableDelayedExpansion
+
+IF x%1x==xx (
+	ECHO Specify backend
+	EXIT /B 1
+) ELSE (
+	SET BACKEND=%1
+)
+CALL workon %BUILD_TAG%
+
+SET PYTHONPATH=tests;!CD!\python;!PYTHONPATH!
+SET DGLBACKEND=!BACKEND!
+SET DGL_LIBRARY_PATH=!CD!\build
+SET DGL_DOWNLOAD_DIR=!CD!\_download
+
+python -m pip install pytest psutil pandas pyyaml pydantic rdflib torchmetrics expecttest || EXIT /B 1
+python -m pytest -v --junitxml=pytest_backend.xml --durations=100 tests\python\!DGLBACKEND! || EXIT /B 1
+python -m pytest -v --junitxml=pytest_common.xml --durations=100 tests\python\common || EXIT /B 1
+ENDLOCAL
+EXIT /B