feat: Add GPU-specific Ray worker images with CI/CD

- Add Dockerfiles for nvidia, rdna2, strixhalo, and intel GPU targets
- Add ray-serve modules (embeddings, whisper, tts, llm, reranker)
- Add Gitea Actions workflow for automated builds
- Add Makefile for local development
- Update README with comprehensive documentation

.gitignore

@@ -0,0 +1,25 @@
+# Build artifacts
+*.log
+*.tmp
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+.pytest_cache/
+.venv/
+venv/
+.env
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Docker
+.docker/