chore: update documentation for tree mappings

doc/nvim-tree-lua.txt

@@ -236,18 +236,51 @@ INFORMATIONS				        *nvim-tree-info*
 
 |g:nvim_tree_bindings|                             *g:nvim_tree_bindings*
 
+You can disable default mappings with
+>
+    let nvim_tree_disable_keybindings=1
+<
+But you won't be able to map any keys from the setup with nvim_tree_bindings. Use with caution.
+
 Default keybindings can be overriden. You can also define your own keymappings for the tree view:
 >
-  lua <<EOF
-      vim.g.nvim_tree_bindings = {
-	["<CR>"] = ":YourVimFunction()<cr>",
-	["u"] = ":lua require'some_module'.some_function()<cr>",
-      }
-  EOF
+    lua <<EOF
+	local tree_cb = require'nvim-tree.config'.nvim_tree_callback
+	vim.g.nvim_tree_bindings = {
+	  ["<CR>"] = ":YourVimFunction()<cr>",
+	  ["u"] = ":lua require'some_module'.some_function()<cr>",
 
-You can check the default binding table in `nvim-tree/config.lua`, under the `get_bindings` function.
-This basically maps the default keys to the `on_keypress` function with different string parameters.
-All mappings are set in `normal` `mode`.
+	  -- default mappings
+	  ["<CR>"]           = tree_cb("edit"),
+	  ["o"]              = tree_cb("edit"),
+	  ["<2-LeftMouse>"]  = tree_cb("edit"),
+	  ["<2-RightMouse>"] = tree_cb("cd"),
+	  ["<C-]>"]          = tree_cb("cd"),
+	  ["<C-v>"]          = tree_cb("vsplit"),
+	  ["<C-x>"]          = tree_cb("split"),
+	  ["<C-t>"]          = tree_cb("tabnew"),
+	  ["<BS>"]           = tree_cb("close_node"),
+	  ["<S-CR>"]         = tree_cb("close_node"),
+	  ["<Tab>"]          = tree_cb("preview"),
+	  ["I"]              = tree_cb("toggle_ignored"),
+	  ["H"]              = tree_cb("toggle_dotfiles"),
+	  ["R"]              = tree_cb("refresh"),
+	  ["a"]              = tree_cb("create"),
+	  ["d"]              = tree_cb("remove"),
+	  ["r"]              = tree_cb("rename"),
+	  ["<C-r>"]          = tree_cb("full_rename"),
+	  ["x"]              = tree_cb("cut"),
+	  ["c"]              = tree_cb("copy"),
+	  ["p"]              = tree_cb("paste"),
+	  ["[c"]             = tree_cb("prev_git_item"),
+	  ["]c"]             = tree_cb("next_git_item"),
+	  ["-"]              = tree_cb("dir_up"),
+	  ["q"]              = tree_cb("close"),
+	}
+    EOF
+<
+
+All mappings are set in `normal mode`.
 
 |Features|					*nvim-tree-features*