refactor code and add fallback prompt to zsh

profiles/base/.zsh/prompt/fallback.zsh

@@ -0,0 +1,8 @@
+if (( EUID == 0 )); then
+	# If root, omit the username and print the hostname in red.
+	PS1='%1v%B%F\h %(?..%? )%F{blue}%~ # %f%b'
+else
+	# Otherwise, print the username and hostname in green.
+	PS1='%1v%B%F{green}%n@%m%F{blue} %(?..%F{red}%? %F{blue})%~ $ %f%b'
+fi
+RPROMPT=$(date '+%H:%m:%S')