fix: make usage and completion static functions

[lukekarrys]

No description provided.

[npm-cli-bot]

no statistically significant performance changes detected

timing results

app-large	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit	show-version	run-script
npm@9	37.717 ±1.76	15.031 ±0.07	15.140 ±0.05	17.448 ±1.34	2.624 ±0.25	2.438 ±0.02	2.047 ±0.01	10.211 ±0.12	2.043 ±0.01	3.181 ±0.02	0.367 ±0.00	0.383 ±0.00
#6477	39.464 ±0.34	15.818 ±0.36	15.500 ±0.22	18.379 ±1.34	2.575 ±0.01	2.530 ±0.01	2.081 ±0.02	10.616 ±0.03	2.070 ±0.00	3.136 ±0.05	0.353 ±0.00	0.402 ±0.01

app-medium	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit	show-version	run-script
npm@9	25.683 ±1.18	11.585 ±0.04	11.178 ±0.05	12.278 ±0.52	2.197 ±0.03	2.224 ±0.03	2.042 ±0.02	7.524 ±0.13	1.911 ±0.01	2.734 ±0.01	0.344 ±0.00	0.373 ±0.01
#6477	27.059 ±4.23	12.097 ±0.07	11.833 ±0.12	12.744 ±0.16	2.321 ±0.04	2.279 ±0.00	2.110 ±0.01	7.930 ±0.09	2.005 ±0.01	2.742 ±0.02	0.361 ±0.00	0.404 ±0.01