feat: add barcode scanner plugin (#536)

plugins/barcode-scanner/ios/Tests/PluginTests/PluginTests.swift

@@ -0,0 +1,13 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+import XCTest
+
+@testable import ExamplePlugin
+
+final class ExamplePluginTests: XCTestCase {
+  func testExample() throws {
+    let plugin = ExamplePlugin()
+  }
+}