Add Discord Channel

Adds Discord bot support via the Chat SDK bridge.

Install

NanoClaw doesn't ship channels in trunk. This skill copies the Discord adapter in from the channels branch.

Pre-flight (idempotent)

Skip to Credentials if all of these are already in place:

• src/channels/discord.ts exists
• src/channels/index.ts contains import './discord.js';
• @chat-adapter/discord is listed in package.json dependencies

Otherwise continue. Every step below is safe to re-run.

1. Fetch the channels branch