refactor(samples): split samples into their own files

[steffnay]

Fixes #367

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[JustinBeckwith]

Congrats on the first PR in this repo! When filing PRs in nodejs land, we really like to use the conventional commits format. It makes things a lot easier when figuring out what's happening in a change log.

Could you rename this PR (and the resulting commit) to something like:
refactor(samples): split samples into their own files

Thanks!

[codecov]

Codecov Report

Merging #368 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #368   +/-   ##
=======================================
  Coverage   99.44%   99.44%           
=======================================
  Files           4        4           
  Lines         544      544           
  Branches       75       75           
=======================================
  Hits          541      541           
  Misses          2        2           
  Partials        1        1

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