gguf shining-valiant shining-valiant-2 valiant valiant-labs llama llama-3.1 llama-3.1-instruct llama-3.1-instruct-8b llama-3 llama-3-instruct llama-3-instruct-8b 8b conversational chat instruct text-generation en license:llama3.1 endpoints_compatible region:us