Rust frontend

This release introduces significant performance optimizations for Kimi-K3 and DeepSeek V4, alongside advancements in speculative decoding and Model Runner V2 maturation. It also features a new Rust frontend and gRPC capabilities, tiered KV cache offloading, and expanded model support.

vLLM v0.27.0 introduces Kimi K3 support, new model additions like Qwen3.5 and VaultGemma, and a significant upgrade to PyTorch 2.13.0. The release also enhances performance and features across various areas including FlashAttention 4, Model Runner V2, KV offloading, and hardware enablement.

vLLM v0.26.0 introduces the Inkling model family, significant performance boosts for DeepSeek-V4, flexible attention backends, and enhanced KV offloading. The release also includes a Rust frontend with multimodal capabilities and deeper integration with Transformers 5.13.0.