Block-crawler

- Add better logging for failing to update token metadata URI
- Add common caveats to nft command docs

- Add block number to error messages to enable replay after the fact in load
- Fix crawl message line error
- Added initial documentation
- Quiet the logs
- Fix crawl/tail stats - use write instead of write batch stats.

- Update README with quickstart
- Add build optional deps for build and publish
- Move websocket exceptions in inbound loop of RPC client logging to DEBUG level
- Add stats to nft tail command and added update stats for nft crawl command
- Remove input check for interfaces in nft loader as it prevented loading of proxy contracts
- Don't display extra transfer items from nft verify command

- Replace signal handler with Signal Manager to properly handle graceful shutdown of crawl and tail nft commands
- Refactor tail to always process one block at a time to always allow for clean shutdown

- Add signal handler for graceful shutdown of nft tail command on interrupt

- Bug fix for nft load command