chore(skills): rename add-*-v2 → add-* and drop dead v1 channel skills

Renamed 13 skill folders to drop the -v2 suffix (the v2/v1 distinction
isn't load-bearing anymore — there is no v1 runtime). Deleted the four
v1 channel skills that occupied the rename target paths (add-discord,
add-slack, add-telegram, add-whatsapp); they targeted src/v1 which is
reference-only per CLAUDE.md.

Skill content still says "v2" in places — that's a follow-up commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.claude/skills/add-webex/REMOVE.md

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+# Remove Webex Channel
+
+1. Comment out `import './webex.js'` in `src/channels/index.ts`
+2. Remove `WEBEX_BOT_TOKEN` and `WEBEX_WEBHOOK_SECRET` from `.env`
+3. `pnpm uninstall @bitbasti/chat-adapter-webex`
+4. Rebuild and restart

.claude/skills/add-webex/SKILL.md

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+---
+name: add-webex-v2
+description: Add Webex channel integration to NanoClaw v2 via Chat SDK.
+---
+
+# Add Webex Channel
+
+Adds Cisco Webex support to NanoClaw v2 using the Chat SDK bridge.
+
+## Install
+
+v2 trunk doesn't ship channels. This skill copies the Webex adapter in from the `channels` branch.
+
+### Pre-flight (idempotent)
+
+Skip to **Credentials** if all of these are already in place:
+
+- `src/channels/webex.ts` exists
+- `src/channels/index.ts` contains `import './webex.js';`
+- `@bitbasti/chat-adapter-webex` is listed in `package.json` dependencies
+
+Otherwise continue. Every step below is safe to re-run.
+
+### 1. Fetch the channels branch
+
+```bash
+git fetch origin channels
+```
+
+### 2. Copy the adapter
+
+```bash
+git show origin/channels:src/channels/webex.ts > src/channels/webex.ts
+```
+
+### 3. Append the self-registration import
+
+Append to `src/channels/index.ts` (skip if the line is already present):
+
+```typescript
+import './webex.js';
+```
+
+### 4. Install the adapter package (pinned)
+
+```bash
+pnpm install @bitbasti/chat-adapter-webex@0.1.0
+```
+
+### 5. Build
+
+```bash
+pnpm run build
+```
+
+## Credentials
+
+1. Go to [developer.webex.com](https://developer.webex.com/my-apps/new/bot) and create a new bot
+2. Copy the **Bot Access Token**
+3. Set up a webhook:
+   - Use the Webex API or Developer Portal to create a webhook pointing to `https://your-domain/webhook/webex`
+   - Set a webhook secret for signature verification
+
+### Configure environment
+
+Add to `.env`:
+
+```bash
+WEBEX_BOT_TOKEN=your-bot-token
+WEBEX_WEBHOOK_SECRET=your-webhook-secret
+```
+
+Sync to container: `mkdir -p data/env && cp .env data/env/env`
+
+## Next Steps
+
+If you're in the middle of `/setup`, return to the setup flow now.
+
+Otherwise, run `/manage-channels` to wire this channel to an agent group.
+
+## Channel Info
+
+- **type**: `webex`
+- **terminology**: Webex has "spaces." A space can be a group conversation or a 1:1 direct message with the bot.
+- **how-to-find-id**: Open the space in Webex, click the space name > Settings — the Space ID is listed there. Or use the Webex API (`GET /rooms`) to list spaces and their IDs.
+- **supports-threads**: yes
+- **typical-use**: Interactive chat — team spaces or direct messages
+- **default-isolation**: Same agent group for spaces where you're the primary user. Separate agent group for spaces with different teams or sensitive information.

.claude/skills/add-webex/VERIFY.md

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+# Verify Webex Channel
+
+Add the bot to a Webex space or send it a direct message. The bot should respond within a few seconds.