feat(licenses): implement license management system with email notifications

- Added database schema for licenses, including types and statuses.
- Implemented license creation, validation, and activation functionalities.
- Integrated email templates for sending license keys and resend requests.
- Updated package dependencies and configuration for PostgreSQL integration.
- Introduced migration and truncation scripts for database management.
- Enhanced API endpoints for license operations with error handling and validation.

apps/licenses/templates/readme.md

@@ -0,0 +1,27 @@
+# React Email Starter
+
+A live preview right in your browser so you don't need to keep sending real emails during development.
+
+## Getting Started
+
+First, install the dependencies:
+
+```sh
+npm install
+# or
+yarn
+```
+
+Then, run the development server:
+
+```sh
+npm run dev
+# or
+yarn dev
+```
+
+Open [localhost:3000](http://localhost:3000) with your browser to see the result.
+
+## License
+
+MIT License