feat: register 16 Core actions for CLI/MCP/API auto-exposure
blockchain.chain.{height,info,block,synced,hardforks,stats,search}
blockchain.alias.{list,get,capabilities}
blockchain.network.{gateways,topology,vpn,dns}
blockchain.supply.{total,hashrate}
Each action is automatically:
- CLI command: core blockchain chain height
- MCP tool: blockchain.chain.height
- HTTP endpoint: /blockchain/chain/height (via core/api)
Uses core.Options for input, core.Result for output.
No banned imports — pure Core primitives.
Co-Authored-By: Charon <charon@lethean.io>