Inline notebook agent polish

[amunger]

• single setting to enable make notebook inline agent independent of inline chat v2 setting #259868
• "allow for session" in notebook inline chat should allow for that notebook until it is closed #259904
• clean up Inline Chat toolbar (no cloud button, do we need Send & Dispatch)
• Track success / survival rate of edits
• ? How do we improve the rendering the tool calls in the widget
• ? Allow users to choose mode (one for editing only, one for all tools)
  • Pragmatic approach is by default we only use editing tools, with a setting to support all notebook* tools
  • How do we define notebook tools, the builtin ones from copilot chat, or all tools with tag notebook (to include tools from Jupyter and Python)

[vs-code-engineering]

Hi @amunger. As a member of the team, you can help us triage this issue by referring to https://github.com/microsoft/vscode-copilot/wiki/Copilot-Inbox-Tracker and assigning an owner directly.