Update the plugins managment. Add the function 'omz-plugin' (inspired from bash-it)

plugins/available/wakeonlan/wakeonlan.plugin.zsh

@@ -0,0 +1,14 @@
+function wake() {
+  local config_file="$HOME/.wakeonlan/$1"
+  if [[ ! -f "$config_file" ]]; then
+    echo "ERROR: There is no configuration file at \"$config_file\"."
+    return 1
+  fi
+
+  if (( ! $+commands[wakeonlan] )); then
+    echo "ERROR: Can't find \"wakeonlan\".  Are you sure it's installed?"
+    return 1
+  fi
+
+  wakeonlan -f "$config_file"
+}