Resolve aliases correctly using options.alias

[davestewart]

Background

In the getExternal() code, there's a naive regexp that resolves "common" src aliases:

Additionally, this has lead to a poor workaround to handle scoped NPM packages:

https://github.com/davestewart/nuxt-areas/blob/main/src/services/areas.js#L145-L156

It would be better to use Nuxt's built-in alias property to resolve aliases, then scoped packages can be handled normally:

https://nuxtjs.org/docs/configuration-glossary/configuration-alias/

Proposal

Check for all uses of aliases, and implement an appropriate solution.