fix: use full npx path for Windows compatibility #49

Job	Run time
Lint and Format	11s
Build Package	12s
Test npx fallback (py3.12, windows-latest)	2m 52s
Type Check	10s
Test npx fallback (py3.12, ubuntu-latest)	1m 50s
Test (py3.13, windows-latest)	6m 10s
Test (py3.9, ubuntu-latest)	1m 53s
Test (py3.13, ubuntu-latest)	1m 58s
Test (py3.9, windows-latest)	6m 8s
CI Success	3s
	21m 27s

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