Feature/add endpoints for realtime api

[HenryHengZJ]

• GET openai-realtime/:id will retrieve the tools connected on the chatflow
• POST openai-realtime/:id will execute the tool specified in the request body

How to use it: https://github.com/FlowiseAI/openai-realtime-console

After realtime client is initialized, simply add the tools:

const fetchTools = async () => {
    const response = await fetch(`${FLOWISE_BASE_URL}/api/v1/openai-realtime/${FLOWISE_CHATFLOW_ID}`, {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer ' + FLOWISE_API_KEY
      }
    });
    const tools = await response.json();
    if (tools) {
      for (const tool of tools) {
        if (Object.hasOwnProperty.call(client.tools, tool.name)) continue
        client.addTool(tool,
          async (args: any) => {
            const response = await fetch(`${FLOWISE_BASE_URL}/api/v1/openai-realtime/${FLOWISE_CHATFLOW_ID}`, {
              method: 'POST',
              headers: {
                'Content-Type': 'application/json',
                'Authorization': 'Bearer ' + FLOWISE_API_KEY
              },
              body: JSON.stringify({
                chatId: sessionID,
                toolName: tool.name,
                inputArgs: args,
              }),
            });
            const result = await response.json();
            const toolOutput = result.output;
            const sources = result.sourceDocuments;
            const artifacts = result.artifacts;

            // do something with the output

            return toolOutput;
          }
        );
      };
    }
  };