Added class and os alternates

.oh-my-zsh/plugins/nvm/nvm.plugin.zsh

@@ -0,0 +1,8 @@
+# Set NVM_DIR if it isn't already defined
+[[ -z "$NVM_DIR" ]] && export NVM_DIR="$HOME/.nvm"
+
+# Try to load nvm only if command not already available
+if ! type "nvm" &> /dev/null; then
+    # Load nvm if it exists
+    [[ -f "$NVM_DIR/nvm.sh" ]] && source "$NVM_DIR/nvm.sh"
+fi