docs: adding deepinfra model HTTP api use case doc (#3677)

* docs: adding deepinfra model HTTP api use case support

* chore: Update website/docs/references/models-http-api/deepinfra.md

Co-authored-by: Meng Zhang <[email protected]>

* docs: update DeepInfra API documentation for clarity and conciseness

---------

Co-authored-by: Meng Zhang <[email protected]>

Author: Sma1lboy

website/docs/references/models-http-api/deepinfra.md

@@ -0,0 +1,39 @@
+# DeepInfra
+
+[DeepInfra](https://deepinfra.com/) is a cloud platform providing efficient and scalable model inference services, offering access to various open-source models like [Llama 3](https://deepinfra.com/meta-llama/Llama-3.3-70B-Instruct), [Mixtral](https://deepinfra.com/mistralai/Mixtral-8x7B-Instruct-v0.1), and [Qwen](https://deepinfra.com/Qwen/Qwen2.5-Coder-32B-Instruct).
+
+## Chat model
+
+DeepInfra provides an OpenAI-compatible chat API interface.
+
+```toml title="~/.tabby/config.toml"
+[model.chat.http]
+kind = "openai/chat"
+model_name = "meta-llama/Llama-3.3-70B-Instruct"
+api_endpoint = "https://api.deepinfra.com/v1/openai"
+api_key = "your-api-key"
+```
+
+## Completion model
+
+DeepInfra provides an OpenAI-compatible completion API interface.
+
+```toml title="~/.tabby/config.toml"
+[model.completion.http]
+kind = "openai/completion"
+model_name = "Qwen/Qwen2.5-Coder-32B-Instruct"
+api_endpoint = "https://api.deepinfra.com/v1/openai"
+api_key = "your-api-key"
+```
+
+## Embeddings model
+
+DeepInfra also provides an OpenAI-compatible embeddings API interface.
+
+```toml title="~/.tabby/config.toml"
+[model.embedding.http]
+kind = "openai/embedding"
+model_name = "BAAI/bge-base-en-v1.5"
+api_endpoint = "https://api.deepinfra.com/v1/openai"
+api_key = "your-api-key"
+```