fix(nfc): Resolve boolean in isAvailable to agree with TypeScript API (#3101)

Co-authored-by: Fabian-Lars <github@fabianlars.de>

plugins/nfc/guest-js/index.ts

@@ -269,5 +269,8 @@ export async function write(
 }
 
 export async function isAvailable(): Promise<boolean> {
-  return await invoke('plugin:nfc|is_available')
+  const { available }: { available: boolean } = await invoke(
+    'plugin:nfc|is_available'
+  )
+  return available
 }