fix(ci): add pytest-timeout and HF Spaces deployment spec

feat(phase-4): Gradio UI with NiiVue visualization (#5)

docs: document SEALS model selection and scientific rationale

feat: Phase 1A + Phase 2 - Local data loader and DeepISLES Docker wrapper (#3)

Refactor documentation for Docker and Gradio implementation. Removed outdated permission fix code and fallback matplotlib rendering section. Updated Gradio approach to use direct Base64 injection instead of FastAPI endpoints, enhancing simplicity and performance.

Add initial project structure and documentation for stroke-deepisles-demo