Include ttui via imports and update to latest

[mjamescompton]

Summary

TTUI was being manually copied every time it needed updating, this add ttui to node_modules and import via theme.scss and theme.js

Changes

• Remove assets/ttui folder
• import main.css via theme.scss
• Update theme.scss link in head.html to process imports which use node_modules
• import required js components in theme.js
• Add js.Build to theme.js resources.Get to process node_module imports

• Notes for Reviewers

  • [ ] Scope: The referenced issue is addressed, there are no unrelated changes.
  • [ ] Run Locally: Verified that the docs build using make server, posted screenshots, verified external links.
  • [ ] Style Guidelines: Documentation obeys style guidelines in CONTRIBUTING.
  • [ ] Commits: Commit messages follow guidelines in CONTRIBUTING, there are no fixup commits left.