It becomes simple and flexible with mermaid codes to update the pic or diagrams. And it also remove the legacy PNG pictures to reduce the kata-statics release file size. Signed-off-by: Alex Lyn <alex.lyn@antgroup.com>
Replace Kata 3.0 architecture docs with Kata 4.0 (Rust Runtime) documentation. Key changes: - Remove deprecated architecture 3.0 documentation - Add comprehensive Kata 4.0 architecture guide covering: - Unified single-binary architecture - Built-in Dragonball VMM integration - Async I/O model with Tokio - Layered architecture design - Modular resource manager - Extensible framework for multiple container types The new documentation reflects the production-ready Rust runtime with improved performance and reduced resource consumption. Signed-off-by: Alex Lyn <alex.lyn@antgroup.com>
