Store chat messages

[AttackingOrDefending]

Type of pull request:

• Bug fix
• Feature
• Other

Description:

Stores chat messages for the duration of the game to allow users to build more complicated chat mechanisms (e.g. letting people vote the result of the game, and after the end saying something depending on the votes).

Related Issues:

None

Checklist:

• I have read and followed the contribution guidelines.
• I have added necessary documentation (if applicable).
• The changes pass all existing tests.

Screenshots/logs (if applicable):

[MarkZH]

How do users access the messages? Would they need to modify a fork of the code?

[AttackingOrDefending]

They would need to add custom code in react in conversation.py. Perhaps this can become more generalized to make it easier to add custom commands, but I wan't sure how I should do it.

[MarkZH]

Yeah, it's difficult to know how to create new features without a use case. Was there a request for something like this on discord or elsewhere?

[AttackingOrDefending]

No. I just thought it would be nice to let people build their own chatters.