feat: add hide_root_folder (#728)

README.md

@@ -94,6 +94,8 @@ require'nvim-tree'.setup {
     width = 30,
     -- height of the window, can be either a number (columns) or a string in `%`, for top or bottom side placement
     height = 30,
+    -- Hide the root path of the current folder on top of the tree 
+    hide_root_folder = false,
     -- side of the tree, can be one of 'left' | 'right' | 'top' | 'bottom'
     side = 'left',
     -- if true the tree will resize itself after opening a file