Investigate @nuxtjs/apollo & replacement options

[HappyNTH]

Unfortunately @nuxtjs/apollo seems somewhat stale and updates to it are slow. It may need replacing or adjusting in some manner, as most packages have moved to bundler and this one has not.

This culminates in an unfortunately ignored TS issue in ./tests/unit/support/helpers/mount.ts (line 5): Cannot find module '@nuxtjs/apollo/dist/runtime/composables' or its corresponding type declarations. ts(2307), caused because we're attempting to import useApollo from the repository's ./dist/runtime/composables. The code is working, but obviously we don't want to be ignoring TS errors!