feat: add ability to add in standalone workloads to an existing operator

[scottd018]

Situation:

• I have a working operator with a collection/component configuration
• I want to add a standalone workload to this operator
• I run the operator-builder create api command to add the standalone workload
• Because the CLI is initially scaffolded during init, it errors out
• Making the companionCliRootcmd match the existing command with work, but the pathing is wonky (mycmd generate generate because a standalone workload expects a root command and not a subcommand)

We should be able to add a StandaloneWorkload to an existing operator without requiring that it exists on its own.