Move block_definition and blocks_catalog

To a new code_generation subfolder.

Author: manuq

addons/block_code/block_definition.gd renamed to addons/block_code/code_generation/block_definition.gd

@@ -1,6 +1,6 @@
 extends Object
 
-const BlockDefinition = preload("res://addons/block_code/block_definition.gd")
+const BlockDefinition = preload("res://addons/block_code/code_generation/block_definition.gd")
 const Types = preload("res://addons/block_code/types/types.gd")
 
 static var _catalog: Dictionary

addons/block_code/blocks_catalog.gd renamed to addons/block_code/code_generation/blocks_catalog.gd

@@ -2,7 +2,7 @@
 class_name Block
 extends MarginContainer
 
-const BlocksCatalog = preload("res://addons/block_code/blocks_catalog.gd")
+const BlocksCatalog = preload("res://addons/block_code/code_generation/blocks_catalog.gd")
 const InstructionTree = preload("res://addons/block_code/instruction_tree/instruction_tree.gd")
 const Types = preload("res://addons/block_code/types/types.gd")
 

addons/block_code/ui/blocks/block/block.gd

@@ -1,7 +1,7 @@
 extends Object
 
-const BlockDefinition = preload("res://addons/block_code/block_definition.gd")
-const BlocksCatalog = preload("res://addons/block_code/blocks_catalog.gd")
+const BlockDefinition = preload("res://addons/block_code/code_generation/block_definition.gd")
+const BlocksCatalog = preload("res://addons/block_code/code_generation/blocks_catalog.gd")
 const Types = preload("res://addons/block_code/types/types.gd")
 
 const SCENE_PER_TYPE = {