feat(chat): Multiple chatting characters in order

[grencez]

If there were more than just 2 characters, we could do a lot more cool things:

• Inner monologue could be formatted with its own unique prefix like the original paper did (https://innermonologue.github.io/).
• Recurring context clues.
• Narration.
• Multiple characters, obviously.

Let's restrict this feature to a simple rotating order for now and make sure it can be changed with on the fly with a command.

[grencez]

Perhaps these lines should be optionally transient and disappear. This this feature could subsume #5.

This and some other things are blocked on real sxproto parsing, so I'll be prioritizing that in https://github.com/fildesh/fildesh/issues/135.

[grencez]

Let's just say these are all the confidant's line prefixes. I don't know if it's a good idea to bother making them optional or mutable during chat, so I won't.

((confidant_prefixes) "{{char}} thinks:" "{{char}}:")

[grencez]

I'm getting good results. Going to make the setting include the protagonist prefix too.

((chat_prefixes) "{{user}}:" "{{char}} goal:" "{{char}}:")

[grencez]

Needs an example and documentation.

[grencez]

I think this needs to be an array of messages instead. Something like:

((chat_prefixes)
 (() (key "{{user}}:"))
 (() (key "{{char}} goal:"))
 (() (key "{{char}}:")))

Or maybe we can just accept the current format of ((chat_prefixes) "{{user}}:" "{{char}} goal:" "{{char}}:") in the long term alongside the message-array one.

[grencez]

Here how about we split the difference. Let's use manyof syntax so the 2 work:

(((chat_prefixes))
 "{{user}}:"
 ((inner_monologue)
  (prefix "{{char}} goal:")
  (rollforget_keep_count 4)
  (repeat_window 0))
 "{{char}}:")

[grencez]

The 2-"person" mode (protagonist & confidant) now functions the same as the multiple character case.