Proposed several style guide additions
What does this MR do?
Proposal for several additions to the GitLab style guide.
@gl-docsteam As with all style choices, these are debatable, but I would like us to make a decision and document it. I've found most of these to be pretty standard in most style guides that I have used previously and I think they help readability in all cases, especially for non-native English speakers.
Thoughts?