Explain the use of Go's io packages for reading and writing data?

Go's io package provides a set of interfaces and functions for reading and writing data in a generic way, independent of the specific source or destination of the data. The package consists of several sub-packages, including io, io/ioutil, and bufio.

The **io** package defines several interfaces, such as **Reader**, **Writer**, **Closer**, and **Seeker**, which allow for the implementation of custom readers and writers that can be used with any function or method that accepts one of these interfaces.

The **io/ioutil** package provides utility functions for reading and writing files, including functions like **ReadFile** and **WriteFile**.

The **bufio** package provides buffered I/O functionality, which can improve performance by reducing the number of system calls made for each I/O operation. It includes the **Scanner** type, which provides a convenient way to read data from an **io.Reader** in a structured way.

Overall, the **io** package and its sub-packages are essential for working with I/O operations in Go, providing a consistent and flexible approach to reading and writing data.