Use the native scheduler for tcloud demos (#10)

* native cloud scheduler

* explain

config.yaml

@@ -1,12 +1,15 @@
 gateways:
     tobiko_cloud: # this will use the config in tcloud.yaml for state_connection
-        connection:
-            type: bigquery
-            method: service-account-json
-            concurrent_tasks: 5
-            register_comments: true
-            keyfile_json: {{ env_var('GOOGLE_SQLMESH_CREDENTIALS') }}
-            project: sqlmesh-public-demo
+        scheduler:
+            type: cloud
+        # connection:
+        # TODO: add this into the Tobiko Cloud Connections Page with the service account json in plain text. We will securely handle the credentials for you.
+        #     type: bigquery
+        #     method: service-account-json
+        #     concurrent_tasks: 5
+        #     register_comments: true
+        #     keyfile_json: {{ env_var('GOOGLE_SQLMESH_CREDENTIALS') }}
+        #     project: sqlmesh-public-demo
 
 default_gateway: tobiko_cloud