Comment Notifications should include full thread history

As a customer using Figma notifications and comments,
I want to be able to respond to Figma comments without having to go into Figma
So that I can quickly respond to questions and move on to other tasks.

When a User receives a notification of a reply to a comment (either in email or slack) they created, that notification should include the full thread history so the user knows what the original response or question was so that the user has context to respond (via email or slack) without having to navigate to figma, load the figma (which is always slow) and disrupting their workflow.