chore(help ui): switch ? to g? because ? is for backward search

README.md

@@ -196,7 +196,7 @@ lua <<EOF
 EOF
 ```
 All mappings are set in `normal mode`.
-You can toggle the help UI by pressing `?`.
+You can toggle the help UI by pressing `g?`.
 
 ## Note
 

doc/nvim-tree-lua.txt

@@ -308,7 +308,7 @@ INFORMATIONS				        *nvim-tree-info*
 
 |KeyBindings|				        *nvim-tree-keybindings*
 
-- type `?` to see the help UI with keybindings
+- type `g?` to see the help UI with keybindings
 - move around like in any vim buffer
 - '<CR>' on '..' will cd in the above directory
 - typing '<C-]>' will cd in the directory under the cursor

lua/nvim-tree/view.lua

@@ -75,7 +75,7 @@ M.View = {
     ["]c"]             = M.nvim_tree_callback("next_git_item"),
     ["-"]              = M.nvim_tree_callback("dir_up"),
     ["q"]              = M.nvim_tree_callback("close"),
-    ["?"]              = M.nvim_tree_callback("toggle_help")
+    ["g?"]              = M.nvim_tree_callback("toggle_help")
   }
 }