Use unbuild to build the Vue & Web Component libraries

[chrisbbreuer]

Please describe the feature

Let's also compare final builds, just to ensure we are doing something worthwhile.

Overall, it seems like a good, zero-config type of direction—especially for component libraries.

Unfortunately, I have struggled with the implementation so far. I feel like I am doing something wrong. The error I encountered when building via unbuild was "Note that you need plugins to import files that are not JavaScript." (IIRC)

Help would be greatly appreciated!

[chrisbbreuer]

A reference to a potentially useful future resource is this thread unjs/unbuild#80

[chrisbbreuer]

compare vs Vite 3.0