PartyLayer/PartyLayer: docs/PUBLIC_API_STABILITY.md

# Public API Stability This document defines the public API stability guarantees for PartyLayer SDK. ## Versioning Policy PartyLayer follows [Semantic Versioning](https://semver.org/): - **MAJOR** (X.0.0): Breaking changes to public API - **MINOR** (0.X.0): New features, backward compatible - **PATC