fix!: move all autostart-related files to standardized location

etc/profile.d/ublue-firstboot.sh

@@ -1,6 +0,0 @@
-if test "$(id -u)" -gt "0" && test -d "$HOME"; then
-    if test ! -e "$HOME"/.config/autostart/ublue-firstboot.desktop; then
-        mkdir -p "$HOME"/.config/autostart
-        cp -f /usr/etc/skel.d/.config/autostart/ublue-firstboot.desktop "$HOME"/.config/autostart
-    fi
-fi

etc/skel.d/.config/autostart/ublue-firstboot.desktop

@@ -1,8 +0,0 @@
-[Desktop Entry]
-Name=uBlue First Boot Setup
-Comment=Sets up uBlue Desktop Correctly On FirstBoot
-Exec=/usr/bin/yafti /usr/share/ublue-os/firstboot/yafti.yml
-Icon=org.gnome.Terminal
-Type=Application
-Categories=Utility;System;
-Name[en_US]=startup