Add Google Workspace setup wizard to onboarding

- Add stepGoogle() wizard that guides users through gog CLI setup
- Check/install gog via Homebrew, guide OAuth credential setup
- Let users select existing accounts or add new ones
- Configure which Google services to enable (gmail, calendar, drive, etc.)
- Add GoogleConfig type and integrations.google to config schema
- Wire GMAIL_ACCOUNT env var from YAML config for polling service
- Add discord.js dependency (fixes build)

🐙 Generated with [Letta Code](https://letta.com)

Co-Authored-By: Letta <noreply@letta.com>

package-lock.json

@@ -16,6 +16,7 @@
         "@types/express": "^5.0.6",
         "@types/node": "^25.0.10",
         "@types/node-schedule": "^2.1.8",
+        "discord.js": "^14.25.1",
         "dotenv": "^17.2.3",
         "express": "^5.2.1",
         "googleapis": "^170.1.0",
@@ -32,12 +33,13 @@
       "bin": {
         "lettabot": "dist/cli.js",
         "lettabot-message": "dist/cli/message.js",
+        "lettabot-react": "dist/cli/react.js",
         "lettabot-schedule": "dist/cron/cli.js"
       },
       "optionalDependencies": {
         "@slack/bolt": "^4.6.0",
         "@whiskeysockets/baileys": "^6.7.21",
-        "discord.js": "^14.18.0"
+        "discord.js": "^14.25.1"
       }
     },
     "letta-code": {