add required plugin for neorg presenter, and make wsphome more adaptaive

after/plugin/neorg.lua

@@ -3,7 +3,8 @@ if not status_ok then
   return
 end
 
-local wsphome = os.getenv("HOME").."/documents/notes/"
+local wsphome = os.getenv("XDG_DOCUMENT_DIR") or
+  (os.getenv("HOME").."/Documents").."/notes/"
 neorg.setup {
   load = {
     ["core.defaults"] = {},
@@ -43,7 +44,7 @@ neorg.setup {
     },
     ["core.presenter"] = {
       config = {
-        zen_mode = "truezen",
+        zen_mode = "zen-mode",
       }
     },
     ["core.integrations.telescope"] = {},