Create visual representation of Terminology and Identifiers for workloads

[leonpawelzik]

Create visual representation of Terminology and Identifiers for workloads

Document the job/workload identifier logic as a conceptual overview, as well as the workload lifecycle (ideally in a diagram).
This will help us for future discussions, avoid confusion, and act as a base for demoing our tool to potential users.

See: kueue concepts