Move visual shaders to a module

modules/visual_shader/doc_classes/VisualShaderNodeResizableBase.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="VisualShaderNodeResizableBase" inherits="VisualShaderNode" api_type="core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
+	<brief_description>
+		Base class for resizable nodes in a visual shader graph.
+	</brief_description>
+	<description>
+		Resizable nodes have a handle that allows the user to adjust their size as needed.
+	</description>
+	<tutorials>
+	</tutorials>
+	<members>
+		<member name="size" type="Vector2" setter="set_size" getter="get_size" default="Vector2(0, 0)">
+			The size of the node in the visual shader graph.
+		</member>
+	</members>
+</class>