feat: add vinegar abilities to the tree

fixes #860

doc/nvim-tree-lua.txt

@@ -585,7 +585,7 @@ INFORMATIONS				        *nvim-tree-info*
 - type `>` to navigate to the next sibling of current file/directory
 - type `J` to navigate to the first sibling of current file/directory
 - type `K` to navigate to the last sibling of current file/directory
-
+- type `<C-e>` to edit the file in place, effectively replacing the tree explorer.
 - if the file is a directory, <CR> will open the directory
 - otherwise it will open the file in the buffer near the tree
 - if the file is a symlink, <CR> will follow the symlink
@@ -605,6 +605,7 @@ Defaults to:
   lua <<EOF
     local list = {
       { key = {"<CR>", "o", "<2-LeftMouse>"}, action = "edit" },
+      { key = "<C-e>",                        action = "edit_in_place" },
       { key = {"O"},                          action = "edit_no_picker" },
       { key = {"<2-RightMouse>", "<C-]>"},    action = "cd" },
       { key = "<C-v>",                        action = "vsplit" },
@@ -745,7 +746,42 @@ NvimTreeFileNew
 NvimTreeFileDeleted
 
 ==============================================================================
-EVENTS                                                 *nvim-tree-events*
+vinegar style                                         *nvim-tree-vinegar*
+
+|nvim_tree_vinegar|                                     *nvim_tree_vinegar*
+
+nvim-tree can behave like vinegar. To allow this, you will need to configure
+it in a specific way:
+
+- Use `require"nvim-tree".open_replacing_current_buffer()` instead of the
+default open command.
+You can easily implement a toggle using this too:
+>
+    local function toggle_replace()
+      local view = require"nvim-tree.view"
+      if view.is_visible() then
+	require.close()
+      else
+	require"nvim-tree".open_replacing_current_buffer()
+      end
+    end
+<
+- Use the `edit_in_place` action to edit files. It's bound to `<C-e>` by
+default, vinegar uses `-`. You can override this with:
+>
+    require"nvim-tree".setup {
+      view = {
+        mappings = {
+          { key = "-", action = "edit_in_place" }
+        }
+      } 
+    }
+<
+You'll also need to set |nvim-tree.hijack_netrw| to `true` during setup.
+A good functionnality to enable is |nvim-tree.hijack_directories|.
+
+==============================================================================
+events                                                 *nvim-tree-events*
 
 |nvim_tree_events|                                     *nvim_tree_events*