Update workflow-preset to v2.0.0

[bigsmartben]

Summary

• Update bundled workflow-preset to v2.0.0.
• Update presets/catalog.json and presets/catalog.community.json metadata.
• Release artifact: https://github.com/bigsmartben/spec-kit-workflow-preset/releases/download/v2.0.0/spec-kit-workflow-preset-v2.0.0.zip

Test Plan

• python3 -m pytest tests/test_presets.py -k 'workflow_preset'

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Update the smoke check for the renamed testability template

In the checked .github/workflows/community-smoke.yml Verify bundled init defaults step, line 67 still runs test -f .specify/presets/workflow-preset/templates/behavior/behavior-testability-checklist.md under set -euo pipefail. This change deletes that packaged file in favor of behavior/behavior-testability.md, so every community smoke run will abort at the stale assertion; update the workflow to check the replacement path.

AGENTS.md reference: AGENTS.md:L78-L81

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[chatgpt-codex-connector]

Require an actual visual evidence reference

For a visual handoff, a receipt whose only evidence is Requirement Status: Required now satisfies _receipt_references_traceable_validation_evidence(), despite identifying neither a Visual Item nor any evidence source. validate_receipt_structure() can therefore accept a generic receipt and allow completion to proceed without the traceability required by the updated implement contract; require a concrete ID or artifact reference rather than accepting this label alone.

AGENTS.md reference: presets/workflow-preset/AGENTS.md:L16-L17

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