chore: migrate to ESLint v9 and relevant packages

[markEHVN]

PR Checklist

• Addresses an existing open issue: fixes 🛠️ Repo: Migrate ESLint to v9 #361
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

• Support ESLint v9

[JoshuaKGoldberg]

Thanks for getting started on this! 🙂

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.50%. Comparing base (91e7d0b) to head (e608781).
Report is 9 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #362      +/-   ##
==========================================
+ Coverage   91.14%   95.50%   +4.36%     
==========================================
  Files          12       11       -1     
  Lines         350      334      -16     
  Branches       42       42              
==========================================
  Hits          319      319              
+ Misses         31       15      -16     

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[JoshuaKGoldberg]

Sorry, I don't think I was clear 😅. I'm requesting that this file be as close as possible to the latest ESLint configs I use in other repositories. The most recently created one is https://github.com/JoshuaKGoldberg/object-strings-deep/blob/41390065d3fa1f06d34bd2ed7d7c0320d8227ec6/eslint.config.js.

This is for two reasons:

• A lot of the settings in this repo's older ESLint config are no longer necessary. I commented a few of them inline to show examples.
• Soon, much of this will be automated, so any deviations from the other ESLint configs will cause extra work.

My advice would be to:

1. Copy and paste the linked eslint.config.js here
2. Add or remove devDependencies as needed
3. Run pnpm lint --fix

If any rules then start reporting complaints, you can either disable them in the config ("<rule-name>": "off") or fix them in the files. We can discuss those changes too if they're not straightforward.

Thanks!

[markEHVN]

Sorry, I don't think I was clear 😅.

Thanks, I updated it. Please help me re-review ❤️

[markEHVN]

I make 2 changes when compare with base eslint configuration file

1. Set ignoreTypeImport to allowing import type { Endpoints } from ''@octokit/types" - reference . To be honest, I do not know why n/no-missing-import can not resolved this import. 😢 .
2. Allow import release-it-action in **/*.md/*.ts glob - reference

[JoshuaKGoldberg]

💯 this looks great, thank you!

Agreed on all the decisions you made 🙂