Update sci doc rules

[mkavulich]

This PR is mostly updates to the second half of the "CCPP-Compliant Physics Parameterizations" chapter, with some other miscellaneous fixes/updates

• Continuing to standardize formatting
• Wording and grammar fixes, clarifications
• Some more details and explanation about scheme pages
• Update various file locations
• Change example Doxygen page to avoid featuring grammar mistake
• Remove some unnecessary detail about starting Doxygen from scratch
• Update Tech Doc citation

You can view the latest version of this branch's proposed changes in ReadTheDocs here: https://mike-k-tech-doc.readthedocs.io/en/latest/CompliantPhysicsParams.html

[ligiabernardet]

@mzhangw Pls take a look at this since it pertains to SciDoc

[mkavulich]

@ligiabernardet and @mzhangw thank you for your comments! I believe I have addressed all the comments, let me know if there is anything else.