Add "style guide" to docs

[FloEdelmann]

What problem does this feature solve?

It would be helpful to have a style guide, similar to Vue's (https://vuejs.org/v2/style-guide/), so that arbitrary choice in Nuxt.js apps is further reduced. Those guidelines could be enforced with a linter, like ESLint or its Vue Plugin.

In particular, a "Component options order" rule came to my mind (similar to https://vuejs.org/v2/style-guide/#Component-instance-options-order-recommended). I've already opened a PR (#1107) to eslint-plugin-vue. Please comment there on the suggested order.

[debs-obrien]

Thanks for your contributions. We are now closing this repo as docs have now moved to nuxtjs.org using content module. Please continue your contributions on that site especially focusing on the guides folder which is the new docs. Thanks

https://github.com/nuxt/nuxtjs.org/blob/master/README.md