Feature: Add an option to open the view in the current tab group.

Hey nice job with this extension.
However I was a bit surprised the web view splitted the screen and created a new tab group, wich is not the standard behavior for opening new editors in vscode.
It would be nice if we can choose instead to open the view as a normal tab in the current group.
Greetings.

No file, test, or entry point is named. Start by locating where the extension opens its browser preview and how it creates a new VS Code tab group; add a user-selectable option for opening the view in the current group, then verify both behaviors manually in VS Code.

Written by the indexing model from the issue text.