implement local directory browser widget

src/app/browser/window/tab/item/client/driver/file/directory.rs

@@ -0,0 +1,14 @@
+use gtk::{gio::File, prelude::FileExt};
+
+pub struct Directory {
+    pub file: File,
+}
+
+impl Directory {
+    pub fn handle(&self, page: &super::Page) {
+        page.content.to_directory(&self.file);
+        page.set_title(&self.file.parse_name());
+        page.set_progress(0.0);
+        page.window_action.find.simple_action.set_enabled(false);
+    }
+}