refactor(shell): replace ANSI escape sequences with tput

[kojiromike]

Several shell scripts use hardcoded ANSI escape sequences for colored output:

echo -e "\033[30m===>\033[0m \033[32mChecking the target dir... \033[0m"

These should be replaced with tput for better portability and readability:

echo "$(tput setaf 0)===>$(tput sgr0) $(tput setaf 2)Checking the target dir...$(tput sgr0)"

Files affected:

• utilities/openemr-env-migrator/openemr-env-migrator
• utilities/openemr-env-installer/openemr-env-installer
• utilities/openemr-monitor/monitor-installer