chore: add option for changelog to write to file

[lukekarrys]

This makes our changelog script do more stuff for us! 🤖

tl;dr

• By default you can run it with no parameters and it will figure out the most recent tag
• Will error if there are unpushed commits or you are on the wrong branch
• Uses the changelog types directly from our @npmcli/template-oss config
• You can run it with an old tag to see how it would generate the notes for that release. This is helpful as we iterate on the script we can see how it would perform historically.
• a --write flag which will write the notes directly to the CHANGELOG.md file in the correct place. And if you run this multiple times, it will find the existing section and update it in place.
• a --read flag to get the release notes for a version directly from the file. This is a convenience method to get the notes after manually editing them instead of copy/pasting

[npm-robot]

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
npm@8	75.213 ±4.01	33.129 ±0.09	19.482 ±0.21	22.375 ±0.65	3.297 ±0.04	3.316 ±0.08	2.850 ±0.06	12.727 ±0.17	2.760 ±0.09	3.854 ±0.14
#4662	74.919 ±1.96	33.342 ±0.03	19.790 ±0.10	22.289 ±0.80	3.494 ±0.06	3.338 ±0.01	2.713 ±0.11	12.912 ±0.12	2.608 ±0.03	3.915 ±0.10

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	40.361 ±0.41	26.151 ±0.08	14.767 ±0.10	15.648 ±0.25	3.005 ±0.02	3.079 ±0.06	2.659 ±0.09	9.503 ±0.21	2.550 ±0.03	3.465 ±0.14
#4662	42.045 ±2.69	25.976 ±0.22	14.663 ±0.17	15.801 ±0.22	3.076 ±0.09	3.086 ±0.01	2.718 ±0.14	9.634 ±0.06	2.529 ±0.01	3.424 ±0.05