Content Detail: add to vue client

[smirolo]

The content detail pages (ex: /envconnect/app/info/boxes-and-enclosures/energy-efficiency/adjust-air-fuel-ratio/) must be added to the Vue client.

Features include:

• loading content
• retrieving coments and posting comments
• upvoting best practice and downvoting best practice
• following best practice and unfollowing best practice

Pointers to current implementation in best_practice.html and comments.html.