🚀 Feature: Fill in remaining tsutils functions (that don't exist on TypeScript)

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

I'm filing this as a catch-all issue for anybody interested in contributing! 👋

tsutils has a lot of functions in it. Many of them are now available as part of this package. But some of them aren't. Welcoming contributions to add functions to this package that exist in tsutils but not yet in ts-api-tools.

The one exception to this is type guards such as isBinaryExpression that now exist on TypeScript itself. tsutils contains a lot of those functions for backwards compatibility with old tsutils+typescript versions - but this package doesn't need to.

Additional Info

Any new file whose contents are essentially a copy & paste of a tsutils file should have the same licensing header as other source files of that nature:

// Code largely based on https://github.com/ajafff/tsutils
// Original license: https://github.com/ajafff/tsutils/blob/26b195358ec36d59f00333115aa3ffd9611ca78b/LICENSE

[JoshuaKGoldberg]

@all-contributors please add @JoshuaKGoldberg for ideas.

🤖 Beep boop! This comment was added automatically by all-contributors-auto-action.
Not all contributions can be detected from Git & GitHub alone. Please comment any missing contribution types this bot missed.
...and of course, thank you for contributing! 💙

[allcontributors]

@JoshuaKGoldberg

I've put up a pull request to add @JoshuaKGoldberg! 🎉

I couldn't determine any contributions to add, did you specify any contributions?
Please make sure to use valid contribution names.