Improve DX around `prefer-global-this` in TypeScript files

[fregante]

A lot of types in the wild are either only set on Window or differ between window.* and globalThis.*. These types are wrong, but they do come up when this rule is applied.

There are a few ways that this rule can help with the migration:

• disable the rule's auto-fix in TS files
• extend the message to specify how to specify the type
• suggest solutions in the rule's readme

Examples:

• prefer-global-this should allow window.setTimeout() and setInterval() #2482
• Disable no-var on globals.d.ts xojs/eslint-config-xo-typescript#91
• prefer-global-this should ignore typeof window === 'undefined' #2468

Originally posted by @fregante in #2482 (comment)