Starweb dev log #23

Themes! In the menu, you can find a theme picker (Nebula, Ember, Verdant, Tide, Rose, Carbon), each with dark and light modes.

Page scripts can react too, with a theme global and a themechange event. The Nebula (The DNS dashboard) panel repaints live off it.

Added a Star-Theme request header too: name, scheme, accent, so a server can render the first paint in the right colors instead of flashing the wrong ones.