Chore: Add prettier config

[michalsnik]

This PR adds automatic generation for prettier config, that disables all layout rules. We're going to use this config in @vue/eslint-config-prettier as well as probably update information in prettier docs to point to this config, instead of a not-synced version that is currently provided.

[armano2]

your gitconfig has wrong username/email :>

[armano2]

we should also propose update to https://github.com/prettier/eslint-config-prettier/blob/master/vue.js

[mysticatea]

Thank you for this PR.

The name vue/prettier looks enabling prettier format to me. How do you think vue/no-layout-rules or something like?

Also we need the document about the preset.

[michalsnik]

Good idea @mysticatea I realised after I started creating PR to eslint-config-prettier:D

Damn, good catch @armano2 - I ran docs deploy and it must've changed my config.

[michalsnik]

Theoretically information about config could stay in prettier documentation. If you're going to configure prettier yourself, this is where this information should be present. And if you'll decide to use @vue/config-prettier - you'll be all set, without ever having to worry about turning any rules off @mysticatea . What do you think?

[armano2]

@michalsnik do you mind enabling require-meta-type rule in config. its required to make this work correctly.

[mysticatea]

OK, LGTM.

[alexschomb]

Just to be sure. Which is the correct .eslintrc.js to use?

This is what I have now (but it seems to report no errors at all):

...
 extends: [
    'eslint:recommended',
    'plugin:vue/recommended',
    'prettier',
    'prettier/vue'
  ],
  plugins: ['vue', 'prettier'],
...

[michalsnik]

This looks fine @alexschomb. Can you show full config, how do you run eslint, does the problem exist if you run eslint through terminal? Also what versions of these packages are you using?