WIP: Add API for making it possible to block loading of SSR only static content components with vue-lazy-hydration

[maoberlehner]

So this is a very rough proof-of-concept of an API for vue-lazy-hydration to register static components that should not be prefetched and loaded on the client.

I'm aware that this probably can't be the final implementation of this but I'd be happy to get feedback and further improve the pull request!

In Nuxt 3 I made the following changes to make this work:

 // app/plugins/preload.server.ts
 export default <Plugin> function preload ({ app }) {
   app.mixin({
     beforeCreate () {
-      const { _registeredComponents } = this.$nuxt.ssrContext
-      const { __moduleIdentifier } = this.$options
-      _registeredComponents.push(__moduleIdentifier)
+      const { _registeredComponents, _staticComponents } = this.$nuxt.ssrContext
+      const { __moduleIdentifier, __lazyHydrationTiming } = this.$options

+      if (!__lazyHydrationTiming) {
+        _registeredComponents.push(__moduleIdentifier)
+      } else if (__lazyHydrationTiming === 'NEVER') {
+        _staticComponents.push(__moduleIdentifier)
+      }
     }
   })
 }