[Components] miyn

# miyn
## URLs
- https://support.miyn.app/docs/zapier-api-documentation/
## Webhook Sources
### new-appointment-instant
#### Description
Emit new event when a new appointment is scheduled. Users can optionally filter by appointment type or assigned staff.
### new-message-instant
#### Description
Emit new event when a new message is received in the system. Users can optionally filter by sender type (customer or staff).
### new-contact-instant
#### Description
Emit new event when a new contact is added to the system. Users can optionally filter by contact source.
## Actions
### create-appointment
#### Description
Create a new appointment with a specified contact. Requires contact details, appointment time, and service type.
### send-message
#### Description
Send a message to a contact or staff member. Requires recipient ID and message content.
### create-contact
#### Description
Create a new contact in the system. Requires name and contact details, with optional fields for additional information.

Start with the miyn Zapier API documentation at the linked support URL and review existing Pipedream API integration components for structure and conventions. Implement the three webhook sources and three actions described in the issue, including their stated inputs and optional filters. Done means each listed event and action is available and behaves according to the documentation.

Written by the indexing model from the issue text.