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/mysql-db.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 
-echo -e '
+printf '
      _ _      _   _
   __| | |__  | | | |___ ___ _ _
  / _` |  _ \ | |_| (_-</ -_)  _|
  \__,_|_.__/  \___//__/\___|_|
-'
+\n'
 
-echo -e "Create new mysql db and user (you will be asked a db name and a password)"
+printf "Create new mysql db and user (you will be asked a db name and a password)\n"
 
 if [ "$(id -u)" -ne 0 ]; then
   echo "Please run as root"