🛠️ [TASK] : Jormungandr transaction builder

[Mr-Leshiy]

Summary

Add a jormungandr tx building and serde logic for catalyst-voting crate.

Description

Need to add a new object JormungandrTx into the catalyst-voting crate and implement serde with building logic following this spec https://input-output-hk.github.io/catalyst-voices/architecture/08_concepts/voting_transaction/transaction/#example