feature: CLI queue support

[JannikSt]

Add queue awareness to the CLI for the new run queue system.

• Show queue position when a run is created as QUEUED
• Show queue position in rl get output
• Add QUEUED status color
• Handle 404 gracefully in rl logs for queued/pending runs
• Wait and retry in follow mode when run is queued

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Note

Low Risk
Low risk: CLI-only changes to display queued runs and handle missing logs more gracefully; no auth, data writes, or protocol changes beyond accepting an extra API field.

Overview
Adds queue awareness to prime rl by accepting runsAhead on RLRun and treating QUEUED as a first-class status.

When creating or fetching a run, the CLI now shows queued state with an estimated queue position and avoids suggesting prime rl logs until the run starts. The rl logs command now handles queued/pending runs that return 404 by either exiting with a friendly message (non-follow) or waiting/retrying in follow mode, and QUEUED is included in the status color map.

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