adding ks8

[robinmordasiewicz]

Adds support for the Kubernetes cluster in the project by integrating the OpenAPI schema file. Specifically, it includes the following changes:

1. Updates the OpenAPI version to "3.0.3" in the openapi.yaml file under manifests/apps/ollama/.
2. Adds a new script in terraform/doit.sh to interact with the OpenAPI schema using cURL commands.
3. Introduces a new petstore.yaml file in the terraform directory, defining a Swagger Petstore API.
4. Modifies the spoke-k8s_cluster.tf file to include a new null_resource block for handling the OpenAPI file, with appropriate triggers for execution.

These changes enable the project to manage and interact with OpenAPI specifications, enhancing the integration and deployment process for Kubernetes clusters.