feat: Add transaction builders and test object mother abstractions

[neilcampbell]

• Added builders for creating payment and asset transfer transactions
• Added transaction, transaction header, address, and test data object mothers
• Test data json is generated when running cargo build on algokit_transaction_ffi
• Renamed PayTransactionFields to PayTransactionFields
• Renamed pay_fields to payment in FFI Transaction struct
• Renamed asset_transfer_fields to asset_transfer in FFI Transaction struct

[joe-p]

LGTM. Will need to resolve merge conflicts with CI

One common thing I noticed is that there were some diffs caused by formatting for Rust, YAML, and TS so we should probably align on what formatting tools we want to use and ensure they are setup properly in the repo.

Also there's an opportunity for us to add some abstraction in the builder (i.e. mainnet and testnet functions) but I don't think we need to focus on that now.