Add Kimi K2.5 for Synthetic

[reissbaker]

Does what it says!

[monotykamary]

pricing is a bit off i think

should be:

• input: 0.55
• output: 2.19

context and output should be 262144 if we're talking about the OG settings with SGLang

EDIT: oh the API shows max output tokens as 65536

- id: "hf:moonshotai/Kimi-K2.5"
- hugging_face_id: "moonshotai/Kimi-K2.5"
- name: "moonshotai/Kimi-K2.5"
- provider: "synthetic"
- always_on: true
- input_modalities: "text", "image"
- output_modalities: "text"
- context_length: 262144
- max_output_length: 65536
- pricing: prompt "$0.00000055", completion "$0.00000219"
- quantization: "int4"
- supported_features: "tools", "json_mode", "structured_outputs", "reasoning"
- openrouter slug: "moonshotai/kimi-k2-thinking"
- datacenters: US