Add Codex Warp tab title workflow

[kinzirva]

Description of changes

Adds a Workflow to start Codex with native run-state and thread-title display:

codex --config 'tui.terminal_title=["run-state", "thread-title"]'

Benefits and safety

• Helps distinguish multiple Codex sessions in Warp.
• Applies only to the launched session; does not edit saved configuration.
• No remote scripts, installation hooks, or additional background services.
• Requires Codex support for tui.terminal_title.
• Community contribution, not an official OpenAI or Warp product.

Validation

• YAML parsing and required-field checks: passed.
• git diff --check: passed.
• Original Warp photo demonstrates Ready/Working and thread titles.

Outstanding checks

• cargo build: not completed locally because Cargo is unavailable.
• Native Warp Workflow picker and execution: awaiting local validation.
• Starting state: not captured.
• Upstream CI: action_required; no jobs started.

Could a maintainer please approve the pending CI run if appropriate?

Related project: warp-context/rightStage#1