Add a toolbar button to open a new tab with various options

[micz]

Add a toolbar button to open a new tab with various options.

• [ ] Add the toolbar button
• [ ] Add an option to let the user choose what happens when pressing the button:
  • [ ] Opening the ChatGPT Web page
    • [ ] Add an option to let the user choose to open it in a new tab or in a popup
  • [ ] Opening the Addon Options
  • [ ] Opening the Custom Prompts manager