docs: adds contributing guide and usage examples

[jpower432]

Description

Adds documentation updates as a follow-on to #36

How has this been tested?

N/A

Types of changes

• Documentation (change which affects the documentation)

Quality assurance (all should be covered).

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing tests pass locally with my changes
• All commits are signed-off.