🚀 Feature: Lint rule for unnecessary ./ prefixes and the like in paths

[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

Coming over from JoshuaKGoldberg/create-typescript-app#1870: I've noticed that a lot of repos -including most of my own- unnecessarily include ./ prefixes in some package.json fields, such as bin.

As in, many packages do this:

"bin": "./bin/index.js",

But they should be linted to doing this:

"bin": "bin/index.js",

Additional Info

Investigation needed: what is the list of fields where this is the case? bin, main, ...?

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