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/ftp.sh

@@ -1,14 +1,14 @@
 #!/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"