update doc/*/libworld.md & update doc/*/entity-properties.md

doc/en/entity-properties.md

@@ -67,6 +67,10 @@ If true - the entity blocks the placement of a block that intersects with the en
 
 Default value: *true*.
 
+### *selectable*
+
+If set to `false` the cursor will ignore the entity, passing the ray.
+
 ### *sensors*
 
 A sensor is an area attached to a physical body that detects the entry of other bodies into it.

doc/en/scripting/builtins/libworld.md

@@ -92,6 +92,8 @@ world.raycast(
         -- exclusion filtering mode:
         --   if true, filter_entities defines the list of ignored entity types
         entities_exclusion: bool = false,
+        -- include entities with selectable=false
+        nonselect_blocks: bool = false;
 
         [==[ additional parameters (blocks) ]==]
         -- id of the block types used for filtering