feat: remove npm set-script

[wraithgar]

BREAKING CHANGE: this removes npm set-script

Folks should use npm pkg set to set the scripts field in their
package.json

Closes npm/statusboard#449

[npm-cli-bot]

found 1 benchmarks with statistically significant performance regressions

• app-large: no-clean:audit

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
npm@8	44.205 ±0.27	23.806 ±0.88	21.374 ±0.07	24.883 ±1.41	3.550 ±0.03	3.682 ±0.16	3.015 ±0.00	15.237 ±0.02	2.867 ±0.02	4.032 ±0.05
#5456	47.958 ±0.39	23.741 ±0.15	21.750 ±0.44	24.461 ±0.49	3.562 ±0.04	3.542 ±0.03	2.926 ±0.04	15.210 ±0.29	2.963 ±0.03	4.542 ±0.37

app-medium	clean	lock-only	cache-only	cache-only peer-deps	modules-only	no-lock	no-cache	no-modules	no-clean	no-clean audit
npm@8	32.979 ±2.95	17.454 ±0.16	15.847 ±0.43	16.562 ±0.36	3.349 ±0.03	3.311 ±0.02	2.979 ±0.00	10.629 ±0.05	2.790 ±0.01	3.801 ±0.00
#5456	34.606 ±0.36	17.833 ±0.14	15.783 ±0.02	17.098 ±0.92	3.302 ±0.03	3.315 ±0.03	3.081 ±0.10	10.759 ±0.06	2.777 ±0.04	3.752 ±0.05

[TheJaredWilcurt]

For those looking up what happened, change your code from this:

npm set-script start "nw ."

to this

npm pkg set scripts.start="nw ."

As the author of the original RFC for set-script, I'm fully in favor of this more versatile approach.

[lukekarrys]

Thank you @TheJaredWilcurt! I'm going to copy your comment to the #5844 issue for more visibility for others needing to migrate from v8 to v9.