Feature: CLI design

[bernardhalas]

Motivation

Claudie needs a CLI for these reasons:

1. Better UX for human operators
2. Interface between a FE
3. Agentic integrations

Description

The CLI will do the following:
It will have a read-only mode by default. Read-write mode needs to be enabled (param/env var/...).
For all outputs, it'll have a -o json support.
For all commands, there will be a --help option to assist semantically and syntactically.
It will contain a --dry-run -o yaml for proposing changes into a file.
For all write-commands it'll leave a custom annotations on the custom resource, e.g. updated-by/created-by.

Exit criteria

• Design a CLI with the above motivation in mind
• Propose a CLI versioning/upgrade process with respect to Claudie