Add Kubernetes objectStorage Recipe - Bicep

Overview of the Resource type and Recipe

Radius.Storage/objectStorage only has an Azure recipe today (Storage account, via the AKS recipe pack). Create a Kubernetes Recipe in Bicep using an S3-compatible store.

Acceptance criteria

1. A Kubernetes Bicep recipe at Storage/objectStorage/recipes/kubernetes/bicep/ (e.g. MinIO: Deployment + Service + PVC) creating the containerName bucket.
2. Emits the Radius result object with the resource type's outputs.
3. Recipe entry added to the default Kubernetes recipe pack (recipepack/kubernetes/default-recipepack.bicep) and wired into the publish-bicep-recipes workflow matrix.
4. README; manual testing with make test-recipe.

Additional context

Example: Data/postgreSqlDatabases/recipes/kubernetes/bicep/; contribution guide docs/contributing/contributing-resource-types-recipes.md.