deprecate rule `prettier` since `eslint-plugin-prettier` itself supports virtual filenames correctly now

[JounQin]

See

https://github.com/prettier/eslint-plugin-prettier/pull/401/files#diff-e9a90fe7b2d3420b8e5f64e24d5f56ffe6383e47b07461172cc29ed21b768905R197-R199

and

https://github.com/prettier/eslint-plugin-prettier/blob/master/eslint-plugin-prettier.js#L192-L209

---

Besides, actually it is supported previously too. All the user need to do is like the following:

module.exports = {
  // ...
  overrides: [
    {
      files: '*.graphql', // it includes virtual filenames like `*.js/0_document.graphql` already
      rules: {
        'prettier/prettier': [
          2,
          {
            parser: 'graphql',
          },
        ],
      },
    },
  ],
}

After `eslint-plugin-prettier@3.4.0`, the above configuration is not needed any more too!

Maybe in eslint-plugin-pretter@3.5.0 after prettier/eslint-plugin-prettier#413 and prettier/eslint-plugin-prettier#415 been merged and released.

[Urigo]

@JounQin that's awesome, thank you for pointing that out!

Would you be willing to send a PR for that?
Maybe also worth updating the docs? because it might be breaking for someone who uses the existing rule?
(and thank you again for your previous PR!)

[JounQin]

I'll raise a PR for it.

But I just found the eslint-plugin-prettier decided to be compatible with eslint-plugin-graphql which is not compatible with this plugin before. So the option for prettier and non-virtual *.graphql filenames is still required, I think we can add some configs which includes this option automatically.

And it seems eslint-plugin-grahql is out of maintainace, so I'm going to ask eslint-plugin-prettiet to remove the related codes.

[JounQin]

I have an idea to support the both two ESLint grahql plugins for eslint-plugin-prettier just now, I'll PR there first.

[Urigo]

@JounQin yes I agree they should remove eslint-plugin-grahql, it's unmaintained for many years now

[Urigo]

reference for why we chose not to go with eslint-plugin-grahql: https://the-guild.dev/blog/introducing-graphql-eslint

[JounQin]

I've raised prettier/eslint-plugin-prettier#413 to make sure eslint-plugin-prettier will be compatible with this plugin out of the box.

I'll raise another PR to remove the prettier rule in this repo in the next step.