Full API support for templates, sections, pages, and settings management

Currently, the API supports listing templates and reading template variables, but doesn't allow creating or updating templates, sections, page content, or page settings.

Users building automated workflows — particularly those integrating internal AI assistants or CRM-based pipelines — need broader API control to manage Sendr end-to-end without manual intervention in the builder.

Requested capabilities:

• Create and update templates

• Manage sections and builder elements via API

• Update page content and personalisation variables

• Configure page settings programmatically

• Trigger and manage page generation