Update wiki for new container and image build architecture
- Document payload, runtime and final image separation
- Add server and GUI runtime image documentation
- Document standalone Romexis Client image and payload flow
- Update local build, Drone CI and multi-arch manifest workflows
- Add staging tags, registry caching and change detection details
- Update project structure, release process and developer documentation
- Keep German and English wiki pages structurally synchronized
- Document the new Compose runtime structure and backend selection
- Add Wiki pages for Romexis Admin and mRomexis Web App
- Add documentation for local build scripts
- Update Quick Start, Configuration, Build System and CI/CD pages
- Extend runtime, image and troubleshooting documentation
- Update sidebar navigation for the new Wiki structure
patrick