feat(camera): add plugin for Android and iOS

plugins/camera/examples/tauri-app/src-tauri/src/lib.rs

@@ -0,0 +1,11 @@
+// Copyright 2019-2022 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_camera::init())
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}