Feature announcement: introducing the Postmark CLI

Postmark has announced the release of its Command-Line Interface (CLI), which allows users to push and pull email templates, send emails, and fetch server lists from the command line. The CLI supports various commands such as `templates pull`, `templates push`, `email raw`, and `servers list`. Users can install Node.js and their Postmark account tokens before using the CLI. The CLI provides a convenient way to automate tasks related to email templates and sending emails, making it easier to integrate with CI/CD pipelines. Additionally, users can use environment variables to bypass authentication prompts.