Implement Webhook Trigger with Data Mapping

[andergmartins]

Add a new workflow trigger that processes incoming webhook requests with the following capabilities:

Key Features

• Generate and expose a public endpoint URL
• Map and parse incoming JSON payload, URL parameters, form-urlencoded (content types: application/json, application/x-www-form-urlencoded).
• Support data type validation and sanitization
• Implement token-based authentication (optional)
• Pass sanitized variables to the workflow engine
• Option to limit specific domain names
• Option to specify a "secret", with an auto-generate button

Technical Requirements

• Secure token generation and validation
• Input sanitization and type enforcement
• Configurable data mapping interface
• Request authentication middleware