General Tree Chat Messages

[danemadsen]

This is a draft PR for implementing #85.

This is a port of a very similar ChatMessage class im using in Maid
https://github.com/Mobile-Artificial-Intelligence/maid/blob/main/lib/utilities/chat_messages.dart

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read the [Flutter Style Guide] recently, and have followed its advice.
• I signed the [CLA].
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is [test-exempt].
• All existing and new tests are passing.

[csells]

this is a pretty big change -- what does it enable?

[danemadsen]

@csells It enables branching conversations where instead of just one message after another. Each message can have multiple responses. This enables logic such as regeneration or edits to messages.

[csells]

those requirements are out of scope for the current version of the toolkit, I'm afraid.

[danemadsen]

Thats fair, ill leave it here for when its needed

[csells]

Much appreciated.