Review usage of language across code base

[Kieranties]

Recent work completed to enable the sha7 (#82) to be returned in the result raised a question on what is the correct language/terminology to use. ShortSha is used elsewhere, but does that communicate that the short sha is the seven character value?

Are there other areas of the codebase that are perhaps inconsistent in their language usage?

This work item should ensure that terminology is well defined, consistently used, and documented for further guidance.