feat: add tools support for ollama

[b4s36t4]

Title:
add tools support for ollama

Related Issues: (optional)

• [Feature] Ollama tools support #796

SDK Usage

import { Portkey } from "portkey-ai";

const portkey = new Portkey({
  baseURL: "http://localhost:8787/v1",
  provider: "ollama",
  customHost: "http://localhost:11434",
});

const tools = [
  {
    type: "function",
    function: {
      name: "get_current_weather",
      description: "Get the current weather for a location",
      parameters: {
        type: "object",
        properties: {
          location: {
            type: "string",
            description:
              "The location to get the weather for, e.g. San Francisco, CA",
          },
          format: {
            type: "string",
            description:
              "The format to return the weather in, e.g. 'celsius' or 'fahrenheit'",
            enum: ["celsius", "fahrenheit"],
          },
        },
        required: ["location", "format"],
      },
    },
  },
];

const completion = await portkey.chat.completions.create({
      model: "llama3.2:1b",
      messages: [
        {
          role: "system",
          content: "You are a helpful assistant",
        },
        {
          role: "user",
          content: "What is weather in canada?",
        },
      ],
      tools: tools,
});
console.log(JSON.stringify(completion));