chore(workflows): disable all GitHub Actions workflows
- Add `workflow: disable: true` to 23 workflow files to temporarily disable CI/CD automation
- Affects agent-contributions, build-macos-packages, ci, cli-tests, comprehensive-tests, configuration-security, contracts-ci, dotenv-check, file-organization, markdown-link-check, phase8-integration, production-deploy, publish-github-packages, publish-native-packages-simple, publish-native-packages, publish-npm-packages, publish-packages-to-registry
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