Remove Nuxt as a Dependency

[codyrancher]

Since we're not using Nuxt for very much functionality we're looking to remove. Ultimately we're trying to simplify the project and make the code more explicit.

TODO:

• Verify that building and building with plugins is still functional. Thus far I've only verified that the local version of nuxt removal works. We still need to make sure that normal and plugin release versions still work. (was tracked by [Nuxt Removal] - Verify Build #6439)
• Live/hot module reload aren't working in the nuxt removal branch. I think this will be a relatively simple webpack configuration task. I think it's just missing rather than being broken. (was tracked by [Nuxt Removal] - Fix live/hot module reload #6437)