[New] Add Guidance for Voting on Edits

[AdultSun]

While I don't believe we should require contributors to vote a certain way, we could still add more guidance in our docs on how we expect contributors to use their YES and NO votes. Topics would include when to feel confident in a YES vote, common courtesies like explaining NO votes with a comment, when/how to ping someone on Discord, when to slow down a vote with a NO, when to reject it outright, and when to abstain from voting at all.

Again, these would be considered "suggestions based on current conventions" rather than "rules that must be followed" since so many votes will depend on the individual edit, voter, and submitter. Creating a strict rubric for voting instead would run counter to the current democratic system we have in place for approving all edits. Essentially, they should explain what voters should consider before deciding to vote YES or NO rather than saying explicitly "X = YES" and "Y = NO", if that makes sense.

We would also likely need a warning that abusing the voting system may result in an admin revoking your edit/vote rights, along with a description of what we would consider abuse.

The "Voting on StashDB" section is getting a bit long and unwieldy already so we may have to split it up somehow. I may experiment with multiple levels of headings for these "Getting Started" pages since so many are essentially miniature guides for each topic. Most of them already split into paragraphs to separate sub-topics so it shouldn't be too difficult to add appropriate sub-headings to describe them.

Current section: https://guidelines.stashdb.org/docs/getting-started-stashdb/#voting-on-stashdb