Add access_type=offline and prompt=consent to Google OAuth2 login URL to enable refresh tokens

Co-authored-by: stnguyen90 <1477010+stnguyen90@users.noreply.github.com>

src/Appwrite/Auth/OAuth2/Google.php

@@ -53,7 +53,9 @@ class Google extends OAuth2
             'redirect_uri' => $this->callback,
             'scope' => \implode(' ', $this->getScopes()),
             'state' => \json_encode($this->state),
-            'response_type' => 'code'
+            'response_type' => 'code',
+            'access_type' => 'offline',
+            'prompt' => 'consent'
         ]);
     }