Feature Request: (Server UI) Use `remark` for markdown rendering

[ngxson]

Prerequisites

• I am running the latest code. Mention the version if possible as well.
• I carefully followed the README.md.
• I searched using keywords relevant to my issue to make sure that I am creating a new issue that is not already open (or closed).
• I reviewed the Discussions, and have a new and useful enhancement to share.

Feature Description

We're currently using markdown-it to render markdown content, but it's a bit hacky because:

• DOM are updated every time new token is added to the generating text (because it relies on setting innerHTML)
• Copy button need to be added separately

The idea is to replace it with remark, which can render markdown directly into vue components. We can rely on plugins to add back functionalities like copy button, latex, code highlight, etc.

Motivation

N/A

Possible Implementation

No response

[ngxson]

Done in #11688