Create a Remix AI assistant plugin:

• This should follow the design from: https://www.notion.so/Use-file-as-chat-context-1966ade09d9e80dabf9bd8140c160019#1d86ade09d9e80348fa9e8e8e74bcd90
• This should be located in the right side panel.
• At this point, we have to identify if we need to remove the remix AI support before releasing.