Default atlas in tellraw should be "items"

25w45a introduced the following change:

Item textures were split out of the blocks atlas into a separate new items atlas
- It means that the commands that were referencing the blocks atlas for item textures now need to reference the items atlas instead

Therefore, every text component using items sprite are no longer working
unless you provide ,"atlas":"items" because the default atlas is blocks .

25w44a	25w45a

The issue is that if people want their pack to be compatible for 1.21.10 and 1.21.11/future updates, they need to make an overlay only to change the targetting atlas.

What I suggest is having the default atlas set to items instead of blocks for the following reason:
- The two following command would work on both 1.21.10 and future updates:

• /tellraw @a {"sprite":"minecraft:item/iron_sword"}

• /tellraw @a {"sprite":"minecraft:block/iron_block","atlas":"blocks"}

The main issue with the 25w45a change is that the items atlas doesn’t exist on prior versions.
Introducing items as the default atlas in future updates would remove the necessity of making overlays for each file using sprite text component.