Introduce Flux Operator CLI

[stefanprodan]

Implement a CLI for building ResourceSet templates locally and for listing, reconciling, suspending and resuming ResourceSets in-cluster.

Examples:

  # Build the given ResourceSet and print the generated objects
  flux-operator build resourceset -f my-resourceset.yaml

  # Build a ResourceSet by providing the inputs from a file
  flux-operator build resourceset -f my-resourceset.yaml \
    --inputs-from my-resourceset-inputs.yaml

  # Pipe the ResourceSet manifest to the build command
  cat my-resourceset.yaml | flux-operator build rset -f -

  # Build a ResourceSet and print a diff of the generated objects
  flux-operator build resourceset -f my-resourceset.yaml | \
    kubectl diff --server-side --field-manager=flux-operator -f -

  # List all ResourceSets
  flux-operator get rset --all-namespaces

  # Reconcile a ResourceSet 
  flux-operator -n apps reconcile rset podinfo

  # Suspend a ResourceSet 
  flux-operator -n apps suspend rset podinfo

  # Resume a ResourceSet 
  flux-operator -n apps resume rset podinfo

[matheuscscp]

LGTM! 🚀