Fix/upgrade to new api (#91)

* Update LoginPanel UI appearance

* Register session with new api

* Modify intent sender such that we can sign messages

* Fix sending transaction intents. Note: I've had to create WonkyIntentPayload as the responses I'm getting are incorrect; once this is fixed, I should replace all instances of WonkyIntentPayload with IntentPayload

* Fix session management. Remove code that is no longer needed

* Update package version

* Update LoginScene for DemoTowerDefenseGame so that it uses the newly branded LoginPanel

* Cleaner logic on when sessionId gets generated

* Fix typos in strings and comments

* Don't throw a null reference exception if SequenceConnector is destroyed before wallet is created

* Replace WonkyIntentPayload with more generic JObject

Author: BellringerQuinn

Assets/Samples~/DemoScene/Demo.unity

@@ -8,9 +8,7 @@
 using UnityEngine.UI;
 
 public class LoginSceneUIManager : MonoBehaviour
-{
-    [SerializeField] private Button _playButton;
-    
+{ 
     private LoginPanel _loginPanel;
     private void Awake()
     {

Assets/Samples~/DemoTowerDefenseGame/Scenes/LoginScene.unity

@@ -49,6 +49,7 @@ private void OnWaaSWalletCreated(WaaSWallet wallet)
 
         private void OnDestroy()
         {
+            if (Wallet == null) return;
             Wallet.OnSendTransactionComplete -= OnSendTransactionCompleteHandler;
             Wallet.OnSendTransactionFailed -= OnSendTransactionFailedHandler;
             Wallet.OnSignMessageComplete -= OnSignMessageCompleteHandler;