Enable terminal chat message copy

[jamespack]

Summary of the Pull Request

This pull request enables copying terminal chat messages from AI Suggesstions.

References and Relevant Issues

#17941

Detailed Description of the Pull Request / Additional comments

Enables both keyboard copy with ctrl+c and mouse copy with a context menu.

Validation Steps Performed

This was tested locally on my machine. Both functions verified to work.

PR Checklist

• Closes [Terminal Chat] No way to copy text from chat history #17941
• Tests added/passed
• Documentation updated
  • If checked, please file a pull request on our docs repo and link it here: #xxx
• Schema updated (if necessary)

[jamespack]

[PankajBhojwani]

Played around with the branch, looks and feels great! Thank you for the contribution

Not a blocker (and I'm not even sure if it's possible but I think it's worth investigating) but I wonder if the "Copy" option should show up even if there's no selection in the bubble (i.e. so we interpret that as "copy the entire message"). That way if a user wants to copy the whole thing they don't need to first click "Select All" and then right click again and click "Copy". This is what happens right now when you right-click without selecting anything first:

Approving anyway since right-click->"Select all"->right-click->"Copy" is still a fairly straightforward way to copy the entire thing, but if you can investigate whether copying the entire thing with the first right-click is possible that'll be great :)