Standardize example documentation across repos

[libutcher]

This PR standardizes the example folders across our repos. It includes the following changes:

• Edits to the README, including adding a description of the example to the intro, changing the header to "prerequisites," and adding an instruction to follow the steps to get started before running the example.
• Edits to the example code comments to include a bit more information and use the same wording as I've proposed in the other repos.

Closes #25

Question:

1. Is it necessary to go through the "get started" steps before running this? For example, would this work correctly without making any changes to the .npmrc file or setting the NPM token?

[libutcher]

@AndyTitu The PRs to standardize the example readmes and code comments are ready! Please make sure to take a look at the questions in each PR description - there are a few details I was unsure of that your opinion would be helpful on. Thank you!