Add speed_test.py and .yml #6

Job	Run time
run_speed_tests (3.9, ubuntu-24.04)	17s
run_speed_tests (3.13, ubuntu-24.04)	19s
run_speed_tests (3.13, windows-latest)	42s
run_speed_tests (3.9, windows-latest)	32s
	1m 50s

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