Create video tutorial

[openvmp]

Create a YouTube video and add it to the README.
The video should demonstrate VS Code IDE with an integrated terminal view, text view (to show examples and partcad.yaml files) and the “OCP CAD Viewer” view.
It should demonstrate “pc init”, “pc list”, “pc list-parts -r”, “pc show”.
Both when “pc show” is called and when examples are executed, the viewer should display the resulting model.