restore: return InferRoute Space to 100% pure original LLM gateway

fix: upgrade Node.js base image to 20-alpine for Vite 8 compatibility

feat: optimize Hugging Face Space Docker build and zero-config deployment

Fix Render deployment dependencies for Quant.ai and InferRoute

feat: platform ecosystem showcase and UI upgrade

feat: add interactive academic documentation hub and Docker deployment config

feat: Kubernetes-ready multi-provider LLM gateway v0.2.0