Import Cardano transactions with `ChainReader`

[jpraynaud]

Why

We need to import the Cardano transactions from the chainsync mini protocol. For this purpose we want to use the ChainReader implemented in #1590.

[!IMPORTANT] This issue is blocked by #1697 and #1704

What

Implement a ChainBlockStreamer implementation of the BlockStreamer by leveraging the existing ChainReader and PallasChainReader.

How

• [x] Implement a ChainBlockStreamer with the ChainBlockReader
• [x] Wire the ChainBlockStreamer in the dependency injection of the signer and aggregator with a PallasChainReader

Later

• Update the Cardano transaction signing configuration

Resources

• https://github.com/txpipe/pallas/blob/1d23f80843bbc34a500bab53bb4392b4d5cdc984/pallas-network/src/miniprotocols/chainsync/buffer.rs#L37
• https://github.com/txpipe/pallas/blob/1d23f80843bbc34a500bab53bb4392b4d5cdc984/pallas-network/src/miniprotocols/chainsync/buffer.rs#L50