style(guide): Consistency in the wording of hardlinks vs hard links

[TRaSH-]

Pull Request

Purpose

Consistency in the wording of hardlinks vs hard links

Approach

Checked the consistency in the wording of hard links vs. hardlinks; we went with hardlinks because the Starr apps use hard links, and the guide is based on the Starr apps. (See message at the bottom)
Sections where the GUI shows hard links we left as hard links.

I received the following reply, and I think this might be the best option.

i think the bigger point than grammar with this particular instance is the colloquial usage and acceptance of the term as "hardlink"
given that, for the purpose and entire point of your guide being generally arr related, they've set the stage of it being hardlink
i would go with that.
its not always a matter of being "technically grammar correct"
as much as being consistent, making your point clear, and being easy to follow
documentation is sometimes a balance between language and purpose
and in this case, i would argue that its better to be consistent across the apps users are using and your guide, than to take the high ground of "AI approves our usage of the term!" or something

Open Questions and Pre-Merge TODOs

Requirements

• These changes meet the standards for contributing.
• I have read the code of conduct.