Add GLM 4.6 FP8 of Chutes provider

[markp018]

Model: zai-org/GLM-4.6-FP8
Base URL: https://llm.chutes.ai
Provider: Chutes AI
Price: $0.5000 USD / Million Input Tokens; $1.7500 USD / Million Output Tokens
Context window: 200.000 token
Mã output token: 128.000 token