Update documentation to align with v4.0.0 release

[david-poindexter]

What documentation page needs changing?

All

What documentation section needs changing?

All

Proposed documentation change

Update all documentation to align with v4.0.0 release. Since the entire build system will be changing from gulp to rollup, it will need a complete overhaul.

Describe alternatives you've considered

n/a

Additional context

n/a