Merge pull request #7 from monteslu/feat/implement-plugin

fix: merge replyTo into OutboundMessage, remove OutboundReplyMessage

fix: address code review — reply type, messageId, spec update

fix: address code review — reply type, messageId, spec update

fix: address code review — reply type, messageId, spec update

style: prettier formatting on channel.ts

test: add runtime module tests

test: add coverage for message handlers, hooks, callbacks, runtime

Add wake/agent hooks support — multiplex chat + system events + agent turns

Add wake + agent message types to protocol

fix: add test mock

fix: add .eslintrc.json

fix: src/ws-client.test.ts

fix: src/config-schema.test.ts

fix: src/channel.test.ts