fix (docs): typos fixed in the Node.js Quickstart

[habeebmoosa]

Fixed typos in the Node.js Quickstart.

Typo 1

• Original: Create a .env file in your project root and add your OpenAI API Key.
• Modified: Create a .env file in your project's root directory and add your OpenAI API Key.
• Reason: "Project's root directory" is more precise.

Typo 2

• Original: Set up a readline interface for taking input from the terminal, enabling interactive sessions directly from the command line.
• Modified: Set up a readline interface to take input from the terminal, enabling interactive sessions directly from the command line.
• Reason: "To take input" is more natural than "for taking input."

Typo 3

• Original: Tools are actions that an LLM can invoke. The results of these actions can be reported back to the LLM to be considered in the next response.
• Modified: Tools are actions that an LLM can invoke. The results of these actions can be reported back to the LLM to be considered for the next response.
• Reason: "For the next response" is more precise.