new feat: gateway dipakai bersama dengan send-wa-kwitansi

including:
    - remove batch_size di config-gw-wa.json
    - merge function, bedakan dengan message_type

config-gw-wa.json

@@ -1,8 +1,6 @@
 {
     "base_url": "https://devcpone.aplikasi.web.id/one-api/",
     "schedule": ["*/2 6-20 * * *"],
-    "delay": 5,
-    "row_per_batch": 50,
     "startDate": "2023-08-01",
     "endDate": "2025-12-30"
 }