Change Error Code Format

[CodyRay]

Should look more like SD1001. Currently, our diagnostic ids are: SemDiffFP, SemDiffFN, and SemDiff

[CodyRay]

This is my proposed scheme:

Code	Explanation	...
SD0001	Method has been moved locally but changed remotely	*
SD0002	Method has been changed locally but moved remotely	*
SD0003	Base class has been changed remotely
SD0004	File has been changed locally and changed or renamed remotly	%
SD1001	Unknown Internal Error
SD1002	GitHub Unauthenticated Rate Limit hit
SD1003	Git repo does not have a GitHub repository as a remote
SD1004	GitHub Authentication Error
SD1005	GitHub Authenticated Rate Limit hit	+

*: This would be a new distinction, at this point they are handled with the same message

%: This would be a new a new diagnostic that would enable us to handle renamed and changed files.

+: This could also just be part of SD1002, making it just "Rate Limit"

[CodyRay]

@MRose90 feedback change numbing scheme. I also removed the authenticated rate limit.

Code	Explanation
SD0001	Method has been moved locally but changed remotely
SD0002	Method has been changed locally but moved remotely
SD0003	Base class has been changed remotely
SD0004	File has been changed locally and changed or renamed remotely
SD1001	Unknown Internal Error
SD2001	GitHub Rate Limit hit
SD2002	Git repo does not have a GitHub repository as a remote
SD2003	GitHub Authentication Error

[CodyRay]

Error messages have been completed. SD0004 is not wired in at this time, but #37 will remain open until that is completed