Customizable "Share This Chat" format options

Add options and/or export template for conversation.

Use case: Copying and pasting a chat as markdown contains invalid markdown when the first line of text is a list. I use ChatGPT to generate lists a lot, and it's become a little cumbersome to always edit these when pasting into my notes.

Example:

**System**: You are a helpful AI assistant.**User**: Generate numbered list of random US presidents with no commentary**Assistant**: 1. George Washington2. John Adams

I would like to be able to have a new line after the username (ie Assistant:) on each message