feat: add option for folder arrows to be inline with indent markers (#1468)

doc/nvim-tree-lua.txt

@@ -201,6 +201,7 @@ Subsequent calls to setup will replace the previous configuration.
         root_folder_modifier = ":~",
         indent_markers = {
           enable = false,
+          inline_arrows = true,
           icons = {
             corner = "└",
             edge = "│",
@@ -670,6 +671,11 @@ UI rendering setup
         Display indent markers when folders are open
           Type: `boolean`, Default: `false`
 
+        *nvim-tree.renderer.indent_markers.inline_arrows*
+        Display folder arrows in the same column as indent marker
+        when using |renderer.icons.show.folder_arrow|
+          Type: `boolean`, Default: `true`
+
         *nvim-tree.renderer.indent_markers.icons*
         Icons shown before the file/directory.
           Type: `table`, Default: `{ corner = "└", edge = "│", item = "│", none = " ", }`