refactor: migrate Markdown to AsciiDoc

GOVERNANCE.adoc

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+== Governance
+
+=== Overview
+
+This project is governed by the following principles and structures to
+ensure transparent, inclusive, and effective decision-making.
+
+=== Roles and Responsibilities
+
+==== Maintainers
+
+Maintainers are responsible for: - Reviewing and merging pull requests -
+Managing releases and versioning - Ensuring code quality and standards -
+Triaging issues and bug reports - Community engagement and support
+
+==== Contributors
+
+Contributors are expected to: - Follow the code of conduct - Submit
+well-documented pull requests - Write tests for new functionality -
+Maintain existing tests - Update documentation as needed
+
+=== Decision Making
+
+==== Minor Changes
+
+* Can be made by any maintainer
+* Include bug fixes, documentation updates, dependency updates
+
+==== Major Changes
+
+* Require discussion in issues or pull requests
+* Include new features, architectural changes, API changes
+* Need approval from at least 2 maintainers
+
+==== Breaking Changes
+
+* Require RFC (Request for Comments) process
+* Need approval from majority of maintainers
+* Must include migration guide
+
+=== Code of Conduct
+
+All participants are expected to follow our Code of Conduct. Violations
+can be reported to the maintainers.
+
+=== Communication
+
+* *Issues*: For bug reports and feature requests
+* *Discussions*: For questions and general discussion
+* *Pull Requests*: For code contributions
+
+=== Licensing
+
+All contributions are made under the terms of the repository’s LICENSE
+file. By submitting a pull request, you agree to license your
+contributions accordingly.
+
+'''''
+
+_Last updated: 2026-07-18_