Improve README Documentation for Hotel Management System

**Description**:
The current README for the Hotel Management System project is missing some important information that would help new users and contributors. Improving the README will make it easier to understand what the project does, how to set it up, and how to contribute.

Suggested improvements:

- **Project Overview**: Add a simple summary of what the project is and its main features.
- **Installation Guide**: Provide easy-to-follow steps for setting up the project on a local machine.
- **Usage Instructions**: Include basic instructions on how to use the main features of the system.

These additions will make the README more helpful and welcoming to new users and contributors.