Use alias when importing components within `src`

[evenstensberg]

Some of the components generated through the CLI could be imported like @/components/myComponent.vue instead of using relative import paths.

[haoqunjiang]

Here are all the occurrences of such import paths:

In these cases, I think . or .. are more readable than @. IMHO, I prefer readability over consistency (see also https://github.com/vuejs/create-vue/pull/45#issuecomment-1034555772). And if I'm not mistaken, relative paths may have better tooling support than aliases.