Create standard rule file format for both defining and toggling rules

[rossmcdonald]

We should use the same format for both defining rules as well as toggling. Sample format:

{
  rules: {
    '*': {
      'object-literal-sort-keys': true,
    },
    'oas2|oas3|jschema': {

    },
    oas3: false,
    oas2: {
      'validate:object-literal-sort-keys': true,
      'radix': false,
      'variable-name': false,
      'curly': false,
      'no-console': false,
      'no-empty-interface': false,
      'ban-types': false,
      'max-classes-per-file': [true, 3],
      'no-var-requires': false,
    },
  }
}

Open Questions

• If rules/oas3 is set to false, doesn't that conflict with a union rule containing oas3 (ie, oas2|oas3? No, since all rules should be unique.
• Should we have a single to for rule definitions to ensure all rule names are unique (ie, something like a ruleDefinitions object, and everything else references the names)? Can evaluate at a later date.

[rossmcdonald]

Added with 18e2493