Add new section on Style

[aalemayhu]

Here we can show examples of using

• Single File Components
• Less, SASS, SCSS, etc.

Also explaining id's, classes and how they can be combined.

[aalemayhu]

Maybe we should link to the last Imba Changelog episode and mark it as experimental.

[aalemayhu]

Since there might be more changes related to this in Imba 2, it's good to wait before adding it.