Update MyItemReader.kt

[GeorgCantor]

Key Optimizations Made:

BufferedReader for InputStream: Instead of using Scanner, which is more complex for this use case, we utilize bufferedReader() to read the entire InputStream as a string efficiently. This approach simplifies the code and improves performance by reducing overhead.

Use of List and Lambda: We replaced the mutable list with a functional approach using List and a lambda expression to create the list of MyItem objects. This enhances readability and conciseness.

Safe JSON Access: The use of optString and optDouble methods allows for safer access to JSON properties, providing default values if the keys are not present. This reduces potential exceptions when accessing optional fields.

Removed Unnecessary Variables: By directly initializing variables within the list construction, we eliminate unnecessary variable declarations, streamlining the code.