Added lazy loading to router

[crnogaj]

Since you have components and views with lots of hardcoded data (e.g. Testimonials.vue) lazy loading will load it only on it's route instead of having it all in one bundle.

Here is how bundle looks without lazy loading

And this is with lazy loading

We can see that app part of bundle is now chunked which improves loading times.

While I was in router I noticed there were some unused imports, inconsistent formatting, inconsistent import syntax and quotes usage so I improved that also.