switch from nvimtree to neotree

lua/custom/plugins/lsp_signature.lua

@@ -1,6 +1,10 @@
 return {
     'ray-x/lsp_signature.nvim',
-    config = function() 
-        require('lsp_signature').setup {}
+    config = function()
+        local cfg = {
+            floating_window_above_cur_line = true,
+            doc_lines = 0,
+        }
+        require('lsp_signature').setup(cfg)
     end
-}
+}