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/x-integration/SKILL.md

@@ -118,7 +118,7 @@ Paths relative to project root:
                        ▼
 ┌─────────────────────────────────────────────────────────────┐
 │  Host (macOS)                                               │
-│  └── src/index.ts → processTaskIpc()                       │
+│  └── src/ipc.ts → processTaskIpc()                         │
 │      └── host.ts → handleXIpc()                         │
 │          └── spawn subprocess → scripts/*.ts               │
 │              └── Playwright → Chrome → X Website           │
@@ -157,9 +157,9 @@ To integrate this skill into NanoClaw, make the following modifications:
 
 ---
 
-**1. Host side: `src/index.ts`**
+**1. Host side: `src/ipc.ts`**
 
-Add import after other local imports (look for `import { loadJson, saveJson, acquirePidLock } from './utils.js';`):
+Add import after other local imports:
 ```typescript
 import { handleXIpc } from '../.claude/skills/x-integration/host.js';
 ```