Improve Windows and Linux error handling (#12)

* Improve windows and linux error handeling

* Send proper error code from windows for write command

* Fix Linux

* Fix getConnectedDevices on windows

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Co-authored-by: fotidim <fdimanidis@gmail.com>
Co-authored-by: fotidim <foti@navideck.com>

example/lib/home/home.dart

@@ -62,7 +62,7 @@ class _MyAppState extends State<MyApp> {
     };
 
     UniversalBle.onScanResult = (result) {
-      debugPrint("${result.name} ${result.manufacturerData}");
+      // debugPrint("${result.name} ${result.manufacturerData}");
       int index = _scanResults.indexWhere((e) => e.deviceId == result.deviceId);
       if (index == -1) {
         _scanResults.add(result);

example/pubspec.lock

@@ -386,7 +386,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.9.1"
+    version: "0.9.2"
   vector_math:
     dependency: transitive
     description: