docs: add showcase info

.showcase.yml

@@ -0,0 +1,8 @@
+size: medium
+description: | 
+  Generate valid Kubernetes YAML using imperative, type-safe code. Think about it like Helm but with actual code. This is a specific implementation of *Infrastructure as Code* that targets only Kubernetes. Using generic IaC tools (Terraform, Pulumi, AWS CDK, etc.) has a terrible impact on the performance and reliability of deployments because we try to replicate the K8S state in external systems and the sync will break, sooner or later. 
+tags:
+  - DevOps
+  - infrastructure
+  - web
+  - Kubernetes