etc/zsh: source misc config if able

etc/zsh/zshrc

@@ -3,11 +3,18 @@
 # enable extended globbing
 setopt extended_glob
 
-# autoload misc files
+# Autoload dotfiles
 for dotfile in "$ZDOTDIR"/*(D); do
     source $dotfile
 done
 
+misc_files=(
+    /etc/zsh_command_not_found
+)
+for file in ${misc_files[@]}; do
+    [[ -r "${file}" ]] && source "${file}"
+done
+
 # Check history file
 if [[ ! -f "${HISTFILE}" ]]; then
     mkdir -p "${HISTFILE%/*}"