Change Details

Refactor Chronik, use CBlockIndex ffi

1. Move `ffi::Block` from chronik-lib to chronik-bridge. This allows us to use this type in other crates, e.g. chronik-indexer. 2. Add ffi definitions for `CBlockIndex` and `CBlock` so we can use them in Rust. 3. Expose `BridgeBlock` through ffi so we can use it in Rust, renamed to `bridge_block`. 4. Change `handle_block_connected` and `handle_block_disconnected` to take `&CBlock` and `&CBlockIndex`.

Refactor Chronik,1. Move `ffi::Block` from chronik-lib to chronik-bridge. This allows us to use this type in other crates, e.g. chronik-indexer. 2. Add ffi definitions for `CBlockIndex` and `CBlock` so we can use them in Rust. 3. Expose `BridgeBlock` through ffi so we can use it in Rust, renamed to `bridge_block`. 4. use Change `handle_block_connected` and `handle_block_disconnected` to take `&CBlock` and `&CBlockIndex ffi`.