[+] Add support for npm global packages

Closes #215

neofetch

@@ -2030,6 +2030,7 @@ get_packages() {
     # OS-independent package managers.
     has pipx  && tot pipx list --short
     has cargo && _cargopkgs="$(cargo install --list | grep -v '^ ')" && tot echo "$_cargopkgs"
+    has npm   && pkgs_h=1 tot npm list -g --depth=0
 
     # OS-specific package managers.
     case $os in