feat: enable stricter type checking options

feat: make the app more fault tolerant

src/lib/components/Terminal.svelte

@@ -4,7 +4,7 @@
 
   function submit(event: Event) {
     event.preventDefault();
-    $serialPort.send(value.trim());
+    $serialPort?.send(0, value.trim());
     value = "";
     io.scrollTo({ top: io.scrollHeight });
   }