Refactor index (#156)

* feat: add Telegram channel with agent swarm support

Add Telegram as a messaging channel that can run alongside WhatsApp
or standalone (TELEGRAM_ONLY mode). Includes bot pool support for
agent swarms where each subagent appears as a different bot identity
in the group.

- Add grammy dependency for Telegram Bot API
- Route messages through tg: JID prefix convention
- Add storeMessageDirect for non-Baileys channels
- Add sender field to IPC send_message for swarm identity
- Support TELEGRAM_BOT_TOKEN, TELEGRAM_ONLY, TELEGRAM_BOT_POOL config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* docs: add index.ts refactor plan

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: extract channel abstraction, IPC, and router from index.ts

Break the 1088-line monolith into focused modules:
- src/channels/whatsapp.ts: WhatsAppChannel class implementing Channel interface
- src/ipc.ts: IPC watcher and task processing with dependency injection
- src/router.ts: message formatting, outbound routing, channel lookup
- src/types.ts: Channel interface, OnInboundMessage, OnChatMetadata types

Also adds regression test suite (98 tests), updates all documentation
and skill files to reflect the new architecture.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* ci: add test workflow for PRs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: remove accidentally committed pool-bot assets

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix(ci): remove grammy from base dependencies

Grammy is installed by the /add-telegram skill, not a base dependency.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -124,7 +124,10 @@ WhatsApp (baileys) --> SQLite --> Polling loop --> Container (Claude Agent SDK)
 Single Node.js process. Agents execute in isolated Linux containers with mounted directories. Per-group message queue with concurrency control. IPC via filesystem.
 
 Key files:
-- `src/index.ts` - Main app: WhatsApp connection, message loop, IPC
+- `src/index.ts` - Orchestrator: state, message loop, agent invocation
+- `src/channels/whatsapp.ts` - WhatsApp connection, auth, send/receive
+- `src/ipc.ts` - IPC watcher and task processing
+- `src/router.ts` - Message formatting and outbound routing
 - `src/group-queue.ts` - Per-group queue with global concurrency limit
 - `src/container-runner.ts` - Spawns streaming agent containers
 - `src/task-scheduler.ts` - Runs scheduled tasks