[Task]: Investigate Setting Default Kernel

[simonkurtz-MSFT]

Describe the task

We always use a virtual environment to self-contain all Python files to this workspace and not clutter or rely on external environments (such as the user's profile on their computer).

There are two tasks here:

1. Investigate whether we can create a default for the local virtual environment and have it set up automatically for Dev Container / Codespaces.
2. Research whether we can use that default across all folders and notebooks to not have to select the virtual environment every time it hasn't been set up yet for that folder.

[simonkurtz-MSFT]

Release 1.4.0 might have addressed this sufficiently. It's a roundabout way to get that done as it requires essentially removing all other options to where the one we want to be defaulted is the last one standing.

For details on kernel configuration in VS Code, see: VS Code Issue #130946

[simonkurtz-MSFT]

We're close on this, but the dev container is not yet selecting the correct kernel even though it is set up and the required modules have been installed. I added to the post-setup instructions. This is a minimal step and not quite annoying enough to spend time on it. Therefore, I am good to close this out, but if anyone comes up with a smoother setup, I'm all ears! Thank you!