Add info to docs on how to prevent using incorrect `twMerge`

[dcastil]

When configuring tailwind-merge, one creates their own twMerge function to call. I should add a guide on how to prevent to accidentally use import { twMerge } from 'tailwind-merge' instead of import { twMerge } from 'src/my-own-tailwind-merge' and explain the ESLint rule I use for that.

[IEdiong]

Hi @dcastil, any thought on how to go about this?

[dcastil]

@IEdiong I typically use ESLint to do that, more specifically the no-restricted-imports rule.

This is my config for it:

{
    "rules": {
        "no-restricted-imports": [
            "error",
            {
                "paths": [
                    {
                        "importNames": ["twMerge"],
                        "name": "tailwind-merge",
                        "message": "Please import { twMerge } from 'path/to/my/own/tailwind-merge'."
                    }
                ]
            }
        ]
    }
}