Update repository-governance extension to v3.0.0

[bigsmartben]

Summary

• Update bundled repository-governance extension to v3.0.0.
• Update extensions/catalog.json metadata.

Test Plan

• python3 -m py_compile extensions/repository-governance/scripts/generate_repository_governance.py
• python3 -m pytest -q tests/test_arch_templates.py tests/integrations/test_cli.py::TestGitExtensionOptIn::test_community_extensions_and_workflow_preset_auto_installed tests/integrations/test_cli.py::TestGitExtensionOptIn::test_no_git_keeps_community_defaults
• python3 -m pytest -q tests/test_presets.py -k workflow_preset_integration_release_payload_contract
• python3 -m json.tool extensions/catalog.json >/dev/null

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Update smoke checks for the renamed governance skill

Renaming the provided command here changes skill-based registrations from speckit-repository-governance-refresh to speckit-repository-governance-generate, but the community smoke workflow still asserts the old skill path at .github/workflows/community-smoke.yml:122 and again after reinstall at lines 200-201. In the Claude/default community smoke path this manifest will create the new directory, so those test -f .claude/skills/speckit-repository-governance-refresh/SKILL.md checks fail unless the workflow/tests are updated or a compatibility alias is kept.

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