Update run script to use essential build

[bethcollins92]

Done

• Move examples.scss to /docs
• Add build:essential script
• Edit /run script to use build:essential

QA

• Check ./run works

Check if PR is ready for release

If this PR contains Vanilla SCSS code changes, it should contain the following changes to make sure it's ready for the release:

• PR should have one of the following labels to automatically categorise it in release notes:
  • Feature 🎁, Breaking Change 💣, Bug 🐛, Documentation 📝, Maintenance 🔨.
• Vanilla version in package.json should be updated relative to the most recent release, following semver convention:
  • if CSS class names are not changed it can be bugfix relesase (x.x.X)
  • if CSS class names are changed/added/removed it should be minor version (x.X.0)
  • see the wiki for more details
• Any changes to component class names (new patterns, variants, removed or added features) should be listed on the what's new page.
• Documentation side navigation should be updated with the relevant labels.

[webteam-app]

Demo starting at https://vanilla-framework-4149.demos.haus

[bartaz]

Thanks @bethcollins92 , while at it, could you also rename watch:scss:skip-standalone to watch:essential?
And maybe it would be worth adding something about build:essential and watch:essential to our docs in /guildes/hacking.md.

[bethcollins92]

Thanks @bartaz, is this enough info?