Spruce Up ESLint Config

[codeincarnate]

Happened to serendipitously run into @JoshuaKGoldberg at a local coding meetup and he's graciously offered to give our ESLint config a once over. In particular he mentioned there were a number of presets we could use to reduce the number of rules we're currently using. Will defer to his expertise there but will otherwise be following up with this.

[JoshuaKGoldberg]

Hello! Looking through https://github.com/grafana/eslint-config-grafana/blob/489cd69/index.js, the biggest note from me is that there are a lot of manually configured rules. TypeScript ESLint has recommended preset configs you can extend from that are improved over time: https://typescript-eslint.io/docs/linting/configs.

I'd suggest trying out the recommended config to start, then if that feels right, trying recommended-requiring-type-checking. One common strategy organizations take is to:

1. Overhaul your eslint-config-* package by:
   1. Clearing any old rules: ... settings
   2. Extending the new preset config(s)
   3. Re-adding any rules: ... settings you definitely want to override
2. In any consuming project:
   1. Bump your eslint-config-* package version
   2. For any rule that has a lot of new failures, disable it in the project's ESLint config
   3. File a todo to investigate enabling that rule

I'd be happy to send a PR if you're interested, and/or help enable some of these rules - let me know!

[codeincarnate]

Hey Josh! Thanks so much for the input 😄 and in terms of strategy that certainly sounds like a good idea. If you'd like to submit a PR it would certainly be welcome. I'm deep in some other things this week and off next week, but I'm happy to track progress and otherwise I should be able to dive in myself once I get back.

[JoshuaKGoldberg]

Fantastic! I filed a couple of PRs for your viewing pleasure:

• feat: revamped config and added sub-configs #26
• reference: brought in revamped ESLint config grafana#56240

[codeincarnate]

Thanks so much Josh, this is absolutely awesome! I'll take a look at these and start testing, I'm not 100% sure I'll be able to get to it this week but if not I will do so first thing once I'm back after being off.