TextEditor: Use FileSystemAccessClient::try_* APIs

Author: https://github.com/mustafaquraish
Commit: f674102447
Pull-request: https://github.com/SerenityOS/serenity/pull/11968
Reviewed-by: https://github.com/TobyAsE

Userland/Applications/TextEditor/MainWidget.h

@@ -24,7 +24,7 @@ class MainWidget final : public GUI::Widget {
 
 public:
     virtual ~MainWidget() override;
-    bool read_file_and_close(int fd, String const& path);
+    bool read_file(Core::File&);
     void open_nonexistent_file(String const& path);
     bool request_close();