fix: update component and import paths

Changes:
- Update font-awesome component closing tag to match naming
- Change @capacitor/app import to use local wrapper
- Fix component self-closing tags in ContactScanView.vue

This improves consistency in component usage and centralizes
capacitor imports through our wrapper layer.

src/lib/capacitor/app.ts

@@ -0,0 +1,9 @@
+// Import from node_modules using relative path
+import { App as CapacitorApp } from '../../../node_modules/@capacitor/app';
+
+// Re-export the App interface with our own wrapper
+export const App = {
+  addListener: (eventName: string, listenerFunc: (data: any) => void) => {
+    return CapacitorApp.addListener(eventName, listenerFunc);
+  }
+};