Feature: Diagnostic documenation

[kobebryant432]

Is your feature request related to a problem? Please describe.
A standard for documenting a diagnostic.
What are the essential elements needed to uniquely describe a diagnostic.

• Name
• Function
• Plotting function(s)
• Type (Model2Self, Model2Ref, etc.)
• Description
• Reference? If existing? For uniquer plots/calculations?
• ?

Describe the solution you'd like

• Add these to the Diagnostic objects
• Add these to the pre-made diagnostic docs
• Ensure that the examples include the correct required function signature