Add "all" configuration that includes all rules

[emlai]

For example, eslint has eslint:all, eslint-plugin-react has plugin:react/all.

I propose to add a similar option to typescript-eslint.

[ldrick]

Hi, I did some work on this and have three questions left, before opening the PR.

1. What would you expect in all.json, error or warn for rules, which have meta.docs.recommended === false?
2. Would you expect for rules known to rival with eslint (like indent)? Disable eslint rules, like recommended.json?
3. Shall this be used as baseConfig for all.json, like in recommended.json?

const baseConfig = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
    sourceType: 'module',
  },
  plugins: ['@typescript-eslint'],
};

[emlai]

1. What would you expect in all.json, error or warn for rules, which have meta.docs.recommended === false?

I would probably prefer error because I don't use warn.

2. Would you expect for rules known to rival with eslint (like indent)? Disable eslint rules, like recommended.json?

Yes I think disabling the eslint rules would be best because I will probably do that anyway when I notice that the eslint rule doesn't work with typescript.

3. Shall this be used as baseConfig for all.json, like in recommended.json?

Probably yes, for consistency.

[ldrick]

@emlai Thanks for your feedback, I did 2. and 3. like you said and just thought on having 1. defaulting to warn just, because if the rule isn't recommended, it might be not an error, which this rule covers.

[VincentLanglet]

@ldrick see #313 (comment)

All rules should be set as error in the all config.