feat: add Backstage Software Catalog entities for platform, chart, and tenant apps

Author: tukue

catalog-info.yaml

@@ -0,0 +1,47 @@
+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: simple-app-infra-code
+  description: Internal Developer Platform for EKS and OpenShift
+  annotations:
+    github.com/project-slug: tukue/simpleAppInfraCode
+    backstage.io/techdocs-ref: dir:.
+spec:
+  type: repository
+  lifecycle: experimental
+  owner: platform-team
+  system: platform
+  providesApis:
+    - tenant-contract
+  dependsOn:
+    - component:app-chart
+---
+apiVersion: backstage.io/v1alpha1
+kind: System
+metadata:
+  name: platform
+  description: Internal Developer Platform providing golden path, GitOps, and observability
+spec:
+  owner: platform-team
+---
+apiVersion: backstage.io/v1alpha1
+kind: Group
+metadata:
+  name: platform-team
+  description: Platform engineering team
+spec:
+  type: team
+  profile:
+    displayName: Platform Team
+  children: []
+---
+apiVersion: backstage.io/v1alpha1
+kind: Group
+metadata:
+  name: app-developers
+  description: Application development teams
+spec:
+  type: team
+  profile:
+    displayName: App Developers
+  children: []

platform/apps/app-b/catalog-info.yaml

@@ -0,0 +1,16 @@
+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: app-b
+  description: Second tenant application proving contract reusability across dev/stage/prod
+  annotations:
+    github.com/project-slug: tukue/simpleAppInfraCode
+spec:
+  type: service
+  lifecycle: experimental
+  owner: app-developers
+  system: platform
+  dependsOn:
+    - component:app-chart
+  providesApis:
+    - tenant-contract

platform/apps/simple-app/catalog-info.yaml

@@ -0,0 +1,16 @@
+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: simple-app
+  description: Demo tenant application deployed via the platform golden path
+  annotations:
+    github.com/project-slug: tukue/simpleAppInfraCode
+spec:
+  type: service
+  lifecycle: experimental
+  owner: app-developers
+  system: platform
+  dependsOn:
+    - component:app-chart
+  providesApis:
+    - tenant-contract

standardized-path/app/catalog-info.yaml

@@ -0,0 +1,31 @@
+apiVersion: backstage.io/v1alpha1
+kind: Component
+metadata:
+  name: app-chart
+  description: Golden path Helm chart — the tenant contract for deploying services on the platform
+  annotations:
+    backstage.io/techdocs-ref: dir:.
+spec:
+  type: library
+  lifecycle: experimental
+  owner: platform-team
+  system: platform
+  dependsOn:
+    - component:simple-app-infra-code
+  providesApis:
+    - tenant-contract
+---
+apiVersion: backstage.io/v1alpha1
+kind: API
+metadata:
+  name: tenant-contract
+  description: Contract defining what app teams provide and what the platform guarantees
+spec:
+  type: helm-values
+  lifecycle: experimental
+  owner: platform-team
+  system: platform
+  definition: |
+    App Team provides: image, port, replicas, env vars, secret refs
+    Platform guarantees: non-root, dropped capabilities, resource boundaries,
+    network isolation, drift detection, immutable tags, cluster portability