feat: add 23 new CLI tools and integration guides

New tools across 13 categories:
- Email/Newsletter: beehiiv, klaviyo, postmark, brevo, activecampaign
- Data Enrichment: clearbit, apollo
- CRO/Testing: hotjar, optimizely
- Analytics: plausible
- Scheduling: calendly, savvycal
- Forms: typeform
- Messaging: intercom
- Social: buffer
- Video: wistia
- Payments: paddle
- Affiliate: partnerstack
- Reviews: trustpilot, g2
- Push: onesignal
- Webinar: demio, livestorm

Each tool includes a zero-dependency CLI and integration guide.
Registry and CLI README updated with all new entries.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tools/clis/demio.js

@@ -0,0 +1,146 @@
+#!/usr/bin/env node
+
+const API_KEY = process.env.DEMIO_API_KEY
+const API_SECRET = process.env.DEMIO_API_SECRET
+const BASE_URL = 'https://my.demio.com/api/v1'
+
+if (!API_KEY) {
+  console.error(JSON.stringify({ error: 'DEMIO_API_KEY environment variable required' }))
+  process.exit(1)
+}
+
+if (!API_SECRET) {
+  console.error(JSON.stringify({ error: 'DEMIO_API_SECRET environment variable required' }))
+  process.exit(1)
+}
+
+async function api(method, path, body) {
+  const res = await fetch(`${BASE_URL}${path}`, {
+    method,
+    headers: {
+      'Api-Key': API_KEY,
+      'Api-Secret': API_SECRET,
+      'Content-Type': 'application/json',
+      'Accept': 'application/json',
+    },
+    body: body ? JSON.stringify(body) : undefined,
+  })
+  const text = await res.text()
+  try {
+    return JSON.parse(text)
+  } catch {
+    return { status: res.status, body: text }
+  }
+}
+
+function parseArgs(args) {
+  const result = { _: [] }
+  for (let i = 0; i < args.length; i++) {
+    const arg = args[i]
+    if (arg.startsWith('--')) {
+      const key = arg.slice(2)
+      const next = args[i + 1]
+      if (next && !next.startsWith('--')) {
+        result[key] = next
+        i++
+      } else {
+        result[key] = true
+      }
+    } else {
+      result._.push(arg)
+    }
+  }
+  return result
+}
+
+const args = parseArgs(process.argv.slice(2))
+const [cmd, sub, ...rest] = args._
+
+async function main() {
+  let result
+
+  switch (cmd) {
+    case 'ping':
+      result = await api('GET', '/ping')
+      break
+
+    case 'events':
+      switch (sub) {
+        case 'list': {
+          const type = args.type
+          let qs = ''
+          if (type) qs = `?type=${type}`
+          result = await api('GET', `/events${qs}`)
+          break
+        }
+        case 'get': {
+          const id = args.id
+          if (!id) { result = { error: '--id required' }; break }
+          result = await api('GET', `/event/${id}`)
+          break
+        }
+        case 'date': {
+          const eventId = args['event-id']
+          const dateId = args['date-id']
+          if (!eventId) { result = { error: '--event-id required' }; break }
+          if (!dateId) { result = { error: '--date-id required' }; break }
+          result = await api('GET', `/event/${eventId}/date/${dateId}`)
+          break
+        }
+        default:
+          result = { error: 'Unknown events subcommand. Use: list, get, date' }
+      }
+      break
+
+    case 'register':
+      switch (sub) {
+        case 'create': {
+          const id = args.id || args['event-id']
+          const name = args.name
+          const email = args.email
+          if (!id) { result = { error: '--id (event id) required' }; break }
+          if (!name) { result = { error: '--name required' }; break }
+          if (!email) { result = { error: '--email required' }; break }
+          const payload = { id, name, email }
+          if (args['date-id']) payload.date_id = args['date-id']
+          if (args['ref-url']) payload.ref_url = args['ref-url']
+          result = await api('POST', '/event/register', payload)
+          break
+        }
+        default:
+          result = { error: 'Unknown register subcommand. Use: create' }
+      }
+      break
+
+    case 'participants':
+      switch (sub) {
+        case 'list': {
+          const dateId = args['date-id']
+          if (!dateId) { result = { error: '--date-id required' }; break }
+          result = await api('GET', `/date/${dateId}/participants`)
+          break
+        }
+        default:
+          result = { error: 'Unknown participants subcommand. Use: list' }
+      }
+      break
+
+    default:
+      result = {
+        error: 'Unknown command',
+        usage: {
+          ping: 'ping',
+          events: 'events [list --type <upcoming|past|all> | get --id <id> | date --event-id <id> --date-id <id>]',
+          register: 'register [create --id <event_id> --name <name> --email <email> --date-id <date_id>]',
+          participants: 'participants [list --date-id <id>]',
+        }
+      }
+  }
+
+  console.log(JSON.stringify(result, null, 2))
+}
+
+main().catch(err => {
+  console.error(JSON.stringify({ error: err.message }))
+  process.exit(1)
+})