initial version for TransferToPublic

[rbaconcordium]

Purpose

To introduce support for TransferToPublic serialize and deserialize functions as part of ensuring serialize and deserialize are available for all account transactions which are currently supported.

Changes

introduce a new handler for TransferToPublic new Payload type for TransferToPublic

Checklist

• [ x ] My code follows the style of this project.
• [ x ] The code compiles without warnings.
• [ x ] I have performed a self-review of the changes.
• [ x ] I have documented my code, in particular the intent of the hard-to-understand areas.
• [ ] (If necessary) I have updated the CHANGELOG.