Add/hubl prettier plugin

[anthmatic]

Types of change

• [ ] Bug fix (change which fixes an issue)
• [x] Enhancement (change which improves upon an existing feature)
• [ ] New feature (change which adds new functionality)

Description

Adds HTML+HUBL prettier formatting

Relevant links

Example page: GitHub issue:

Checklist

• [ ] I have read the CONTRIBUTING document.
• [ ] My code follows the style guide requirements.
• [ ] I have thoroughly tested my change.

People to notify