Move CanPlaceOn to item base

java/server/world/item/block/mod.mcdoc

@@ -25,7 +25,6 @@ dispatch mcdoc:block_item_states[%unknown,%none] to struct {
 
 type BlockItemComponents = (
 	super::ItemBaseComponents |
-	"can_place_on" |
 	"block_entity_data" |
 	"block_state" |
 )
@@ -35,8 +34,6 @@ dispatch minecraft:item_component[%blockitem] to BlockItemComponents
 /// An item that can be placed as a block
 dispatch minecraft:item[%blockitem] to struct BlockItem {
 	...super::ItemBase,
-	/// List of blockstates that this block item can be placed on.
-	CanPlaceOn?: [#[block_predicate] string],
 	BlockEntityTag?: BlockEntityData,
 	/// Blockstate that the placed block will have.
 	BlockStateTag?: mcdoc:block_item_states[[%parent.id]],

java/server/world/item/mod.mcdoc

@@ -334,6 +334,7 @@ dispatch minecraft:data_component[use_remainder] to ItemStack
 enum(string) ItemBaseComponents {
 	AttributeModifiers = "attribute_modifiers",
 	CanBreak = "can_break",
+	CanPlaceOn = "can_place_on",
 	CustomData = "custom_data",
 	CustomModelData = "custom_model_data",
 	Damage = "damage",
@@ -371,6 +372,8 @@ struct ItemBase {
 	Unbreakable?: boolean,
 	/// List of the block states that can be destroyed by this item when holding it in adventure mode.
 	CanDestroy?: [#[block_predicate] string],
+	/// List of blockstates that this block item can be placed on.
+	CanPlaceOn?: [#[block_predicate] string],
 	/// Tag that describes the custom model an item will take.
 	/// Used by the `custom_model_data` model overrides predicate.
 	/// Has certain restrictions due to float conversion.