update doc/en structure

doc/en/4.Item-properties.md

@@ -1,39 +0,0 @@
-# Visual
-
-## *icon-type* and *icon* itself
-
-Icon type defines a source of an item image displayed in inventory.
-- **none** - invisible type, used for *core:empty* only (empty item, like the air block). May be removed in future updates.
-- **sprite** - default type. 2D image. Requires *icon* set to *atlas_name:texture_name*. Example: *blocks:notfound*.
-  There's two atlases available:
-	- **blocks** (generated from *png* files in *res/textures/blocks/*)
-	- **items** (generated from *png* files in *res/textures/items/*)
-- **block** - block preview. Block ID must be specified in **icon** property. Example: *base:wood*.
-
-# Behaviour
-
-## *placing-block*
-
-Specifies what block will be placed on RMB click. Automatically specified in generated items.
-
-Example: an items that places bazalt blocks:
-
-```json
-"placing-block": "base:bazalt"
-```
-
-## *emission*
-
-Light emitted when player holds the item in hand.
-
-An array of 3 integers - R, G, B of light in range \[0, 15\]
-
-Examples:
-
-- *\[15, 15, 15\]* - white with maximal intensity
-- *\[7, 0, 0\]* - dim red light
-- *\[0, 0, 0\]* - no emission (default value)
-
-## *stack-size*
-
-Maximal number of an item units in one slot. Default - 64.