Allow speakers other than Ray to occupy the left hand side (gray) chat bubbles.

[marcuswhybrow]

• Since Ray's passing, some pertinent transcripts talk about Ray, but do not include him.
• Ordinarily, ray would appear on the left and other speakers appear on the right, aping iMessage.
• However, since Ray is absent, all speakers are jammed into the right hand side.
• This means no messages can be "short" messages, because "short" messages only happen when the previous speaker was on a different left/right alignment to the message being shortened, this limitation avoids visual confusion.
• No "short" messages hurts readability a lot, and makes the transcript feel careless.

Solution?

• Add a front matter field to specify speakers that should appear on the "Ray Peat", left hand side.
• Current logic assumes only one speaker can occupy this this left hand side, so update that too.

[marcuswhybrow]

I think this is fixed now that prioritySpeakers frontmatter field can list multiple speakers.