feat(chat): Prompt to connect when a disconnected user tries to run code from participant VSCODE-618

[gagik]

VSCODE-618
When a users asks the participant something that results in code generation we provide a button to run the code. However, they may not be connected to an instance, so they can't run that code. At the moment if a user hits the > Run button while not connected we fail silently. This involves adding a connection flow when not connected. Similar to the Change active connection command handler.

Description

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[alenakhineika]

I tried it out yesterday and didn't click comment :) works well 👍