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

ray-serve/requirements.txt

@@ -0,0 +1,24 @@
+# Ray Serve dependencies
+ray[serve]==2.53.0
+
+# LLM inference
+vllm
+
+# Embeddings and reranking
+sentence-transformers
+
+# Speech-to-text
+faster-whisper
+
+# Text-to-speech
+TTS
+
+# HTTP client
+httpx
+
+# Numerical computing
+numpy
+scipy
+
+# Optional: Intel GPU support (for danilo node)
+# intel-extension-for-pytorch