Add chatGPT pre-prompt population

[coatless]

ChatGPT isn't a search engine nor does it allow for easy pre-population via a URL embed; however, we can make it available to have the user paste a pre-populated prompt alongside of their query into chat.

A sketch of the idea would be:

As a highly knowledgable R programmer, please ... 

Help find a solution to the following problem I'm running into:
{query string}

If prompt is blank:

As a highly knowledgable R programmer, please ... 

Analyze the following error: 
{error text}