Add support for ignoring files

Sometimes you want to specifically ignore files from being linted (for example, you have some server side handlebars files in the repo).

I’d like for these ignores to go into the existing .template-lintrc.js file (I don’t really want to have “yet another file” for this like .eslintignore).

Perhaps something like:

module.exports = {
  extends: 'recommended',
  
  ignoredFiles: [.....],
};

Thoughts?

[bmish]

Yes. ESLint has a large variety of ways for ignoring files, and while I don’t think it’s necessarily needed or urgent to support all of them, my preference would be to follow ESLint’s lead.

[lolmaus]

I’ve added a TypeDoc theme to my codebase. TypeDoc happens to use Handlebars. Now ember-template-lint freaks out. 😦