docs: add integration docs Mistral AI API

docs/docs/guides/07-integrations/04-integrate-mistral-ai.mdx

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+---
+title: Integrate Mistral AI with Jan
+slug: /guides/integrations/mistral-ai
+description: Guide to integrate Mistral AI with Jan
+keywords:
+  [
+    Jan AI,
+    Jan,
+    ChatGPT alternative,
+    local AI,
+    private AI,
+    conversational AI,
+    no-subscription fee,
+    large language model,
+    Mistral integration,
+  ]
+---
+
+## Quick Introduction
+
+[Mistral AI](https://docs.mistral.ai/) currently provides two ways of accessing their Large Language Models (LLM) - via their API or via open source models available on Hugging Face.  In this guide, we will show you how to integrate Mistral AI with Jan using the API method.
+
+## Steps to Integrate Mistral AI with Jan
+
+### 1. Configure Mistral API key
+
+You can find your API keys in the [Mistral API Key](https://console.mistral.ai/user/api-keys/) and set the Mistral AI API key in `~/jan/engines/openai.json` file.
+
+```json title="~/jan/engines/openai.json"
+{
+  // highlight-start
+  "full_url": "https://api.mistral.ai/v1/chat/completions",
+  "api_key": "<your-mistral-ai-api-key>"
+  // highlight-end
+}
+```
+
+### 2. Modify a Model JSON
+
+Navigate to the `~/jan/models` folder. Create a folder named `<mistral-modelname>`, for example, `mistral-tiny` and create a `model.json` file inside the folder including the following configurations:
+
+- Ensure the filename must be `model.json`.
+- Ensure the `id` property is set to the model id from Mistral AI.
+- Ensure the `format` property is set to `api`.
+- Ensure the `engine` property is set to `openai`.
+- Ensure the `state` property is set to `ready`.
+
+```json title="~/jan/models/mistral-tiny/model.json"
+{
+  "sources": [
+    {
+      "filename": "mistral-tiny",
+      "url": "https://mistral.ai/"
+    }
+  ],
+  "id": "mistral-tiny",
+  "object": "model",
+  "name": "Mistral-7B-v0.2 (Tiny Endpoint)",
+  "version": "1.0",
+  "description": "Currently powered by Mistral-7B-v0.2, a better fine-tuning of the initial Mistral-7B released, inspired by the fantastic work of the community.",
+  // highlight-next-line
+  "format": "api",
+  "settings": {},
+  "parameters": {},
+  "metadata": {
+    "author": "Mistral AI",
+    "tags": ["General", "Big Context Length"]
+  },
+  // highlight-start
+  "engine": "openai"
+  // highlight-end
+}
+```
+
+:::tip
+
+Mistral AI provides different endpoints. Please check out their [endpoint documentation](https://docs.mistral.ai/platform/endpoints/) to find the one that suits your needs. In this example, we will use the `mistral-tiny` model.
+
+:::
+
+### 3. Start the Model
+
+Restart Jan and navigate to the Hub. Locate your model and click the Use button.
+
+![Mitral AI Tiny Model](assets/04-mistral-ai-tiny-hub.png)
+
+### 4. Try Out the Integration of Jan and Mistral AI
+
+![Mistral AI Integration Demo](assets/04-mistral-ai-integration-demo.gif)