Initial support for ChainSync

Stream Blocks from the Node

This release adds initial support for the Chain Synchronization n2c mini-protocol. This allows clients to stream blocks from the upstream node. For the time being, the following limitations apply:

• Only Conway blocks
• Only block header information is provided

See https://github.com/wowica/xander/blob/main/run_chain_sync.exs for example on how to use it.

What's Changed

• Concurrent query test by @daveminer in #33
• ChainSync by @caike in #23
• Add support for sync_from: :origin for yaci-devkit by @caike in #37
• Chainsync Integration Test by @daveminer in #36
• Update README with ChainSync by @caike in #38
• Add logo by @caike in #40
• Add license by @caike in #41
• Publish v0.3.0 by @caike in #42

Full Changelog: 0.2.0...v0.3.0