More meaningful default localIdentName for CSS modules

[chrisvfritz]

What problem does this feature solve?

Currently, the generated classes from CSS modules only include the hash by default, which makes identifying that class at a glance quite difficult. I think most people would probably prefer generated class names that look more like NavBar__container__dsRsJ_0, which current requires this option in vue.config.js:

vueLoader: {
  cssModules: {
    localIdentName: '[name]__[local]__[hash:base64:5]'
  }
}

What does the proposed API look like?

What are thoughts on the localIdentName above being the default?