Diacritics in Performer Names

[DogmaDragon]

Adding a confirmed guideline.
Thread: https://discord.com/channels/559159668438728723/1076296943996780565

I tried to not be very verbose, but you might want it to expand it if it's too concise.

[AdultSun]

I expanded on the guideline explanation section a little. I think brevity is less important there, especially since we're planning on re-organizing those sections to be stand-alone pages soon.

The biggest change I made is a shift in framing from "diacritics should be used" to "diacritics may be used." Otherwise it sounds too much like any alias with diacritic markings should override all other considerations when picking the primary name, which I don't believe was the intention with this guideline. I clarify that everything listed under "Preferred Primary Names" still applies here while linking to that section.

[DogmaDragon]

Good point on should, not sure why I choose it from the allow mentioned in the Discord thread. My bad.

[AdultSun]

I think this is ready now. Here's a preview of what it'll look like on the website, I'll share it on Discord for any additional feedback before merging it.

[DogmaDragon]

I like can be included more than are allowed in the context of this sentence. But I'm good with whatever.

[AdultSun]

I just felt like "can be included" was too clunky, especially when I use "included" again at the end of the sentence. When you reminded me of how you used "allow" earlier instead I felt that would allow the sentence to flow better. I don't think there's any significant change in meaning there, just personal preference. I'll leave it as-is for now.

It's been a couple days and I haven't gotten any other comments on the current language, so I'll merge this PR.