add item.caption(...) function & move item library docs to libitem.md

doc/en/scripting.md

@@ -10,6 +10,7 @@ Subsections:
 - [Entities and components](scripting/ecs.md)
 - [Libraries](#)
     - [block](scripting/builtins/libblock.md)
+    - [item](scripting/builtins/libitem.md)
     - [entities](scripting/builtins/libentities.md)
     - [cameras](scripting/builtins/libcameras.md)
     - [mat4](scripting/builtins/libmat4.md)
@@ -306,38 +307,6 @@ inventory.move(invA: int, slotA: int, invB: int, slotB: int)
 Move item from slotA of invA to slotB of invB. invA may be the same as invB.
 If slotB will be chosen automaticly if argument is not specified.
 
-## *item* library
-
-```python
-item.name(itemid: int) -> str
-```
-
-Returns item string ID (name) by index
-
-```python
-item.index(name: str) -> int
-```
-
-Returns item integer ID (index) by name
-
-```python
-item.stack_size(itemid: int) -> int
-```
-
-Returns max stack size for the item
-
-```python
-item.defs_count() -> int
-```
-
-Returns count of available item IDs.
-
-```python
-item.icon(itemid: int) -> str
-```
-
-Returns item icon name to use in 'src' property of an image element
-
 ## *hud* library
 
 

doc/en/scripting/builtins/libblock.md

@@ -10,7 +10,7 @@ block.index(name: str) -> int
 -- Returns the id of the block material.
 block.material(blockid: int) -> str
 
--- Returns the block name displayed in the UI.
+-- Returns the block display name.
 block.caption(blockid: int) -> str
 
 -- Returns integer ID by block position

doc/en/scripting/builtins/libitem.md

@@ -0,0 +1,21 @@
+# *item* library
+
+```lua
+-- Returns item string ID (name) by index
+item.name(itemid: int) -> str
+
+-- Returns item integer ID (index) by name
+item.index(name: str) -> int
+
+-- Returns the item display name.
+block.caption(blockid: int) -> str
+
+-- Returns max stack size for the item
+item.stack_size(itemid: int) -> int
+
+-- Returns count of available item IDs.
+item.defs_count() -> int
+
+-- Returns item icon name to use in 'src' property of an image element
+item.icon(itemid: int) -> str
+```