Implement Saving of Batch Payment Transaction in Backend

[Aditya-A-G]

Currently, our application saves individual payment transactions to the database, but it doesn't do the same for batch payments.
It's crucial that we also store batch payments in the database to have complete information about all transactions.

Expected Behavior:

When a batch payment is processed, the details of the transaction should be saved in the database, similarly to how individual payments are handled.To facilitate this, a new API endpoint should be created, like POST /api/groups/:id/batch_payment

Reference Links:

For the implementation of this feature, the following existing code can be referred to:

• https://github.com/optriment/web3-employment/blob/main/src/useCases/createPayment.ts#L22
• https://github.com/optriment/web3-employment/blob/main/src/pages/api/groups/%5Bid%5D/recipients/%5Brecipient_id%5D/payment.ts