GET Lister les plans

GET /api/v1/billing/plans

{
  "data": [
    {
      "code": "free",
      "name": "Free",
      "priceEur": 0,
      "limits": {
        "maxInstances": 1,
        "maxApiKeys": 1,
        "maxWebhookEndpoints": 0,
        "monthlyOutboundQuota": 20,
        "monthlyApiRequestQuota": 1000
      },
      "features": {
        "campaigns": false,
        "statuses": false,
        "voiceNotes": true,
        "webhooks": false
      }
    }
  ]
}