Write deployment and activation transaction hex data to a file

[kairoski03]

Description

An option has been added to write the hex value of the bytecode for deployment transactions to a file when running the cargo check command.
cargo stylus c -e https://sepolia-rollup.arbitrum.io/rpc --output deployment_tx.txt

Additionally, the activation-tx command has been introduced to output or write the activation transaction bytecode hex to a file.
cargo stylus activation-tx --address 0x6b48549bF9Bf2e507c745Abc9Ad7b66d48B15025 --output activation_tx.txt

These features are currently being used when deploying Arbitrum Stylus contracts in Remix through the CODE BY WELLDONE STUDIO plugin. They will also be useful for developers building development tools.

Checklist

• I have documented these changes where necessary.
• I have read the DCO and ensured that these changes comply.
• I assign this work under its open source licensing.