The wire project existed prior to the @node-lightning/bitcoin project. As a result, many of the wire messages use primitive types (Buffer or BigInt) to represent script or bitcoin values.

This task is to include the @node-lightning/bitcoin project in @node-lightning/wire. Then refactor the classes to use the Value and Script types instead of BigInt and Buffer.

This will impact open_channel, accept_channel, shutdown, and closing_signed message types. Tests should be updated accordingly.