Replace echo -e with printf for portable ANSI banners

dash (Debian's /bin/sh) doesn't support echo's -e flag: it prints "-e"
literally as text before processing the rest of the string's backslash
escapes. Every script's colored banner was affected. printf's escape
handling is POSIX-mandated and behaves identically under dash and bash,
so swap all 90 echo -e calls for printf, appending the trailing \n that
echo used to add implicitly.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

bin/urbackup.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 
 
-echo -e '\033[35m
+printf '\033[35m
   _   _     _             _                ___ _    _         _
  | | | |_ _| |__  __ _ __| |___  _ _ __   / __| |  (_)___ _ _| |_
  | |_| |  _|  _ \/ _` / _| / / || |  _ \ | (__| |__| / -_)   \  _|
   \___/|_| |_.__/\__,_\__|_\_\\_,_| .__/  \___|____|_\___|_||_\__|
                                   |_|
-\033[0m'
+\033[0m\n'
 
 if [ "$(id -u)" -ne 0 ]; then
   echo "Please run as root"