Renaming package to ShadowArch to follow /wiki/Design_Principles; improved packing; development sync to current state -- massive overhaul

EtcFiles/skel/.config/xfce4/panel/launcher-7/13909659211.desktop

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+[Desktop Entry]
+Name=Thunar File Manager
+Comment=Browse the filesystem with the file manager
+GenericName=File Manager
+Exec=thunar %F
+Icon=Thunar
+Terminal=false
+StartupNotify=true
+Type=Application
+Categories=System;Utility;Core;GTK;FileTools;FileManager;
+X-XFCE-Source=file:///usr/share/applications/Thunar.desktop