Set profile to have custom number of terminals at the same time by default

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> Whenever I use VScode for my projects, I always open 3 separate terminals in the editor itself, and change the **color**, **name** and **icon** to be able to differentiate one from the other quickly. One for commands (Zsh), one to have a Ruby console (irb) and one for the server (puma). Each of them with a different color and icon.