feat(core): update session, security system and QR exchange

- Removed session creation and Lightning payment logic
- Refactored security system:
  * no more restrictions
  * all systems enabled on session creation
- Improved QR code exchange for mobile devices

node_modules/html5-qrcode/src/camera/factories.ts

@@ -0,0 +1,33 @@
+/**
+ * @fileoverview
+ * Set of factory implementations around Camera.
+ * 
+ * @author mebjas <minhazav@gmail.com>
+ */
+
+import { Camera } from "./core";
+import { CameraImpl } from "./core-impl";
+
+/** Factory class for creating Camera. */
+export class CameraFactory {
+
+    /**
+     * Returns {@link CameraFactory} if {@link navigator.mediaDevices} is
+     * supported else fails.
+     */
+    public static async failIfNotSupported(): Promise<CameraFactory> {
+        if (!navigator.mediaDevices) {
+            throw "navigator.mediaDevices not supported";
+        }
+
+        return new CameraFactory();
+    }
+
+    private constructor() { /* No Op. */ }
+
+    /** Creates camera instance based on constraints. */
+    public async create(videoConstraints: MediaTrackConstraints)
+        : Promise<Camera> {
+        return CameraImpl.create(videoConstraints);
+    }
+}