godot 4 sketchbook

Often I want to quickly try some small thing in Godot, maybe a code doodle, a shader, a prototype, a test of a feature, some algorithm etc, but starting a new project every time sucks, so it's nice to have a single 'sketchbook' project that you can keep adding to, and when it gets big, why not make it presentable, give it a menu, and upload it onto itch.io