feat(editors): restore vscode alongside zed for build123d workflows

- linux: programs.vscode via pkgs-master with gnome-libsecret password store
- darwin: visual-studio-code cask + aerospace window rules
- idols-ai: persist .vscode and .config/Code (Settings Sync handles extensions)
- xdg: code.desktop editor association and vscode:// scheme handler

home/linux/gui/base/xdg/mime.nix

@@ -18,6 +18,7 @@
           "firefox.desktop"
         ];
         editor = [
+          "code.desktop"
           "dev.zed.Zed.desktop"
           "nvim.desktop"
           "Helix.desktop"
@@ -47,6 +48,8 @@
         "x-scheme-handler/ftp" = browser; # open `ftp:` url with `browser`
         "x-scheme-handler/http" = browser;
         "x-scheme-handler/https" = browser;
+        # https://github.com/microsoft/vscode/issues/146408
+        "x-scheme-handler/vscode" = [ "code-url-handler.desktop" ]; # open `vscode://` url with `code-url-handler.desktop`
         "x-scheme-handler/zoommtg" = [ "Zoom.desktop" ];
 
         # all other unknown schemes will be opened by this default application.