Add router testing to storybook

[asvae]

Vuestic-ui version: 1.8.0

We had it before (on vue-book), but with storybook we don't have router stories anymore.

Probably we need similar behaviour to form, So we need a sort of tester for generic component, that checks if router is properly connected. Component should also work fine if router is not present.

There is a couple of components, button, breadcrumb etc. Check useRouterLink usages for full list.

This might be a way to make it work - https://stackoverflow.com/questions/73739645/how-to-use-vuerouter-with-storybook.

That's pretty important as the feature is widely used.