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/php7.4.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-echo -e "\033[35;1mInstalling PHP 7.4 \033[0m"
+printf "\033[35;1mInstalling PHP 7.4 \033[0m\n"
 apt-get -y install lsb-release apt-transport-https ca-certificates
 wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
 echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/php.list
@@ -13,4 +13,4 @@ cp "$_assets"/php7.4-fpm.ini /etc/php/7.4/fpm/php.ini
 systemctl enable php7.4-fpm
 systemctl start php7.4-fpm
 
-echo -e "\033[92;1mphp7.4-fpm installed\033[O"
+printf "\033[92;1mphp7.4-fpm installed\033[O\n"