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>

.claude/skills/debug/SKILL.md

@@ -276,8 +276,8 @@ rm -rf data/sessions/
 # Clear sessions for a specific group
 rm -rf data/sessions/{groupFolder}/.claude/
 
-# Also clear the session ID from NanoClaw's tracking
-echo '{}' > data/sessions.json
+# Also clear the session ID from NanoClaw's tracking (stored in SQLite)
+sqlite3 store/messages.db "DELETE FROM sessions WHERE group_folder = '{groupFolder}'"
 ```
 
 To verify session resumption is working, check the logs for the same session ID across messages: