feat: docs update

docs/en/models/minimax.mdx

@@ -0,0 +1,27 @@
+---
+title: MiniMax
+description: MiniMax model configuration
+---
+
+```json
+{
+  "model": "MiniMax-M2.5",
+  "minimax_api_key": "YOUR_API_KEY"
+}
+```
+
+| Parameter | Description |
+| --- | --- |
+| `model` | Options include `MiniMax-M2.5`, `MiniMax-M2.1`, `MiniMax-M2.1-lightning`, `MiniMax-M2`, etc. |
+| `minimax_api_key` | Create at [MiniMax Console](https://platform.minimaxi.com/user-center/basic-information/interface-key) |
+
+OpenAI-compatible configuration is also supported:
+
+```json
+{
+  "bot_type": "chatGPT",
+  "model": "MiniMax-M2.5",
+  "open_ai_api_base": "https://api.minimaxi.com/v1",
+  "open_ai_api_key": "YOUR_API_KEY"
+}
+```