chore: Standardize NPM scripts across examples

[josephfusco]

As a Headless Toolkit contributor, I would like to see standardized npm scripts commands across the toolkit's examples in order to keep things simple.

Acceptance Criteria

• NPM commands are standardized across the examples.
• Readmes are updated to reflect adjustments

Notes

Dependent on #304

Consider following industry standards. What are patterns in similar projects?

e.g.

npm start