added url_launcher to link to code repository

lib/pages/landing_page.dart

@@ -3,6 +3,7 @@ import 'package:resume/services/breakpoints.dart';
 import 'package:resume/services/content_provider.dart';
 import 'package:resume/widgets/content_widget.dart';
 import 'package:resume/widgets/profile.dart';
+import 'package:url_launcher/url_launcher.dart';
 
 class LandingPage extends StatefulWidget {
   const LandingPage({super.key});
@@ -41,8 +42,8 @@ class _LandingPageState extends State<LandingPage> {
     return Scaffold(
       appBar: AppBar(
         title: const Text('Landing'),
-        actions: [
-          TextButton(onPressed: () {}, child: const Text('Source Code')),
+        actions: const [
+          TextButton(onPressed: _launchURL, child: Text('Source Code')),
         ],
       ),
       body: !loadingDone
@@ -119,3 +120,10 @@ class _LandingPageState extends State<LandingPage> {
     );
   }
 }
+
+_launchURL() async {
+  final Uri url = Uri.parse('https://git.skup.in/marco/resume');
+  if (await launchUrl(url)) {
+    throw Exception('Could not launch $url');
+  }
+}