FR: Add K8s format option to `thv registry info`

[danbarr]

The thv registry info command has a --format flag to output details of MCP servers in the registry in either text or json format. As a user of the Kubernetes Operator, I'd like to be able to get a starting point for an MCPServer resource manifest from a registry entry.

The idea would be:

thv registry info --format k8s <some-server>

This would be similar in principal to #2072 which adds this for the export command for running workloads, just a bit more boilerplate.