feat: add method to configure roundess of borders (#11)

Co-authored-by: sxyazi <sxyazi@gmail.com>

full-border.yazi/README.md

@@ -18,5 +18,11 @@ Add this to your `init.lua` to enable the plugin:
 require("full-border"):setup()
 ```
 
-This plugin overrides the [`Manager.render`](https://github.com/sxyazi/yazi/blob/latest/yazi-plugin/preset/components/manager.lua) method,
-you might need to check if any other plugins that also need to override it are enabled.
+Or you can customize the border type:
+
+```lua
+require("full-border"):setup {
+	-- Available values: ui.Border.PLAIN, ui.Border.ROUNDED
+	type = ui.Border.PLAIN,
+}
+```