Per-project VS Code coloured windows

Following on from my trick to change my terminal colour based on the project (git repo) I&rsquo;m in, Simon Späti shared that he does the same for his editor, Neovim. Which got me thinking, could I do the same for my editor, VS Code? Turns out I could by writing a small VS Code extension, with AI assistance. This only changes the colour of the title bar, rather than the entire background like my…