feat: implement periodic shopify sales sync

- automated sales check (default 10 mins)

- manual reconciliation menu

- updates 'status' and 'shopify_status' in sheet

- updated docs

src/appsscript.json

@@ -7,6 +7,8 @@
   "oauthScopes": [
     "https://www.googleapis.com/auth/spreadsheets",
     "https://www.googleapis.com/auth/script.external_request",
-    "https://www.googleapis.com/auth/script.container.ui"
+    "https://www.googleapis.com/auth/script.container.ui",
+    "https://www.googleapis.com/auth/script.scriptapp",
+    "https://www.googleapis.com/auth/drive"
   ]
 }