Write block tutorial

[TibbersHao]

This small PR adds a demonstration of the write_block functionality to the writing tutorial, as suggested in #693.

Key components covered in the code block:

• Pre-define ArrayStructure
• Split Chunks
• Allocate ArrayClient
• Use write_block with specific index

To follow the flow of the original tutorial, the session has been added right after the demonstration of write_array under the head of "Write data", please feel free to make changes as needed.