Add Rierino to Platforms section

[hellorierino]

Type of change

• Add an entry to an existing category.
• Remove an existing entry. Provide rationale
• Modify an existing entry. Provide rationale
• Add/modify/remove a category or subcategory. Provide rationale
• Other fixes or amendments.

Rationale

Rierino is purpose-built for microservice development and orchestration. It abstracts infrastructure complexity while giving developers control over backend logic, service composition, and API orchestration. Key microservices-relevant capabilities include:

• Visual Saga Designer for API, process, and event-driven flows
• Visual Runner Designer for creating microservices from building blocks
• Composable microservice architecture with modular, extensible services
• Built-in support for REST, GraphQL, SOAP, and OData integrations
• Cloud-native with support for Kubernetes, Docker, hybrid, and on-prem deployments
• Free self-hosted Community Edition option

Checklist

• The contribution follows the CONTRIBUTING.md document guidelines.

Regarding the suggested entry:

• It is sorted alphabetically in its section.
• It does not exist already in the list.
• It is not for marketing purposes.