feat: add `size` to invoke_handler

plugins/fs/src/lib.rs

@@ -417,6 +417,7 @@ pub fn init<R: Runtime>() -> TauriPlugin<R, Option<config::Config>> {
             commands::write_file,
             commands::write_text_file,
             commands::exists,
+            commands::size,
             #[cfg(feature = "watch")]
             watcher::watch,
             #[cfg(feature = "watch")]