feat: add mistral AI as LLM provider (#2496)

Co-authored-by: Saket Aryan <94069182+whysosaket@users.noreply.github.com>

mem0-ts/src/oss/examples/llms/mistral-example.ts

@@ -0,0 +1,78 @@
+import dotenv from "dotenv";
+import { MistralLLM } from "../../src/llms/mistral";
+
+// Load environment variables
+dotenv.config();
+
+async function testMistral() {
+  // Check for API key
+  if (!process.env.MISTRAL_API_KEY) {
+    console.error("MISTRAL_API_KEY environment variable is required");
+    process.exit(1);
+  }
+
+  console.log("Testing Mistral LLM implementation...");
+
+  // Initialize MistralLLM
+  const mistral = new MistralLLM({
+    apiKey: process.env.MISTRAL_API_KEY,
+    model: "mistral-tiny-latest", // You can change to other models like mistral-small-latest
+  });
+
+  try {
+    // Test simple chat completion
+    console.log("Testing simple chat completion:");
+    const chatResponse = await mistral.generateChat([
+      { role: "system", content: "You are a helpful assistant." },
+      { role: "user", content: "What is the capital of France?" },
+    ]);
+
+    console.log("Chat response:");
+    console.log(`Role: ${chatResponse.role}`);
+    console.log(`Content: ${chatResponse.content}\n`);
+
+    // Test with functions/tools
+    console.log("Testing tool calling:");
+    const tools = [
+      {
+        type: "function",
+        function: {
+          name: "get_weather",
+          description: "Get the current weather in a given location",
+          parameters: {
+            type: "object",
+            properties: {
+              location: {
+                type: "string",
+                description: "The city and state, e.g. San Francisco, CA",
+              },
+              unit: {
+                type: "string",
+                enum: ["celsius", "fahrenheit"],
+                description: "The unit of temperature",
+              },
+            },
+            required: ["location"],
+          },
+        },
+      },
+    ];
+
+    const toolResponse = await mistral.generateResponse(
+      [
+        { role: "system", content: "You are a helpful assistant." },
+        { role: "user", content: "What's the weather like in Paris, France?" },
+      ],
+      undefined,
+      tools,
+    );
+
+    console.log("Tool response:", toolResponse);
+
+    console.log("\n✅ All tests completed successfully");
+  } catch (error) {
+    console.error("Error testing Mistral LLM:", error);
+  }
+}
+
+testMistral().catch(console.error);