Expand tutorials of writing array blocks

[TibbersHao]

With some of my recent work, I have extensively utilized the functionality of tiled.client.array.ArrayClient.write_block to write back single slices of 2d arrays to client during the result generation phase.

If needed, I am happy to tailor my codes and contribute a paragraph or two under the tutorial of writing arrays, as it might be beneficial for future developers to leverage on.

What I am thinking about to cover:

• Create Array structure using ArrayStructure.from_array
• Divide structure into desired chunks
• Pre-allocate space as a container in Tiled client
• Write blocks according to index

Does that sound like a good idea?

[danielballan]

That would be very welcome. Thanks!

[TibbersHao]

Great, @danielballan a small PR #696 just submitted, feel free to make changes!