doc: Make all module docs self-contained

modules/visual_script/doc_classes/VisualScriptSelect.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<class name="VisualScriptSelect" inherits="VisualScriptNode" category="Core" version="3.0-alpha">
+	<brief_description>
+		Chooses between two input values.
+	</brief_description>
+	<description>
+		Chooses between two input values based on a Boolean condition.
+		[b]Input Ports:[/b]
+		- Data (boolean): [code]cond[/code]
+		- Data (variant): [code]a[/code]
+		- Data (variant): [code]b[/code]
+		[b]Output Ports:[/b]
+		- Data (variant): [code]out[/code]
+	</description>
+	<tutorials>
+	</tutorials>
+	<demos>
+	</demos>
+	<methods>
+		<method name="get_typed" qualifiers="const">
+			<return type="int" enum="Variant.Type">
+			</return>
+			<description>
+			</description>
+		</method>
+		<method name="set_typed">
+			<return type="void">
+			</return>
+			<argument index="0" name="type" type="int" enum="Variant.Type">
+			</argument>
+			<description>
+			</description>
+		</method>
+	</methods>
+	<members>
+		<member name="type" type="int" setter="set_typed" getter="get_typed" enum="Variant.Type">
+			The input variables' type.
+		</member>
+	</members>
+	<constants>
+	</constants>
+</class>