feat(fast-html): add boolean expression resolver to boolean attribute

[janechu]

Pull Request

📖 Description

This change allows for a boolean expression chain binding to resolve on a boolean attribute.

Example:

<input
  ?disabled="{{active == current}}"
  ?required="{{someValue > someOtherValue}}"
>

There is some duplicate logic, but it requires a larger refactor to consolidate it. Will take that as a follow up step.

🎫 Issues

Alternative to #7330

👩‍💻 Reviewer Notes

This refactors the template somewhat to a switch statement when assessing and applying attribute bindings.

📑 Test Plan

Added a test in the attribute fixture.

✅ Checklist

General

• I have included a change request file using $ npm run change
• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.