Fix pale Wi-Fi/Bluetooth tray icons, das-panel-icon help, publisher and deployer (0.9.5)

- Light theme uses Papirus-Light: the panel icons of Papirus are #dfdfdf,
  made for dark panels (xsettings, theme index, login screen).
- das-panel-icon help/-h/--help print usage instead of setting an icon;
  unknown options are rejected.
- New packages publisher (publish) and deployer (deploy) on the desktop
  image: config in ~/.config/<name>/ (neutral example copied on first run),
  history in ~/.local/state/<name>/.
- das-theme 0.3.0, das-settings 0.6.0.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

srcpkgs/das-settings/template

@@ -4,7 +4,7 @@
 # Defaults go to /etc/xdg/das, which /etc/profile.d/das-xdg.sh puts in front of
 # /etc/xdg: stock Xfce files stay untouched and users' own changes still win.
 pkgname=das-settings
-version=0.5.0
+version=0.6.0
 revision=1
 create_wrksrc=yes
 depends="das-theme lightdm lightdm-gtk-greeter xfce4-notifyd xfce4-panel