Invoice hold notitifcation

We are using R12 version 12.1.3 and below is the requirement in Payables

Once the Invoice is created, manual HOLD will be applied by the User by opening the Invoice. Business looking for below options
1. User should have an option to input the remarks for the hold in DFF attributes

1. 2. Workflow notification should be sent with HOLD details along with the Remarks column of DFF (business will decide who will receive the notification later)
   3. Notification should not have release option and person will fill the release reason and release the manual HOLD via Notification
2. 4. User should have a provision to attach the document if required before the hold gets released.