[DOCS]: better docs around setup

[AndreaPontrandolfo]

It's not fully clear to me how to setup the plugin in a FlatConfig, meaning eslint.config.js, the docs could be expanded on that.

[AndreaPontrandolfo]

Also, i'm sorry to report that it's not working for me.

Used it like this (in flat config):

import paths from 'eslint-plugin-paths';
   export default [ 
      {
      plugins: { paths },
      rules: {
        'paths/alias': 2,
      },
    }
]

I see no warnings from Eslint

Node v20.10.0
eslint: v8.57.0
typescript: v5.3.3