add the immediate address space (new name for push_constant)

`push_constant` is kept because it did exist for quite a while

wgsl.xml

@@ -63,6 +63,44 @@
 			<item>array</item>
 		</list>
 
+		<list name="Type Aliases">
+			<item>vec2f</item>
+			<item>vec3f</item>
+			<item>vec4f</item>
+
+			<item>vec2h</item>
+			<item>vec3h</item>
+			<item>vec4h</item>
+
+			<item>vec2i</item>
+			<item>vec3i</item>
+			<item>vec4i</item>
+
+			<item>vec2u</item>
+			<item>vec3u</item>
+			<item>vec4u</item>
+
+			<item>mat2x2f</item>
+			<item>mat2x3f</item>
+			<item>mat2x4f</item>
+			<item>mat3x2f</item>
+			<item>mat3x3f</item>
+			<item>mat3x4f</item>
+			<item>mat4x2f</item>
+			<item>mat4x3f</item>
+			<item>mat4x4f</item>
+
+			<item>mat2x2h</item>
+			<item>mat2x3h</item>
+			<item>mat2x4h</item>
+			<item>mat3x2h</item>
+			<item>mat3x3h</item>
+			<item>mat3x4h</item>
+			<item>mat4x2h</item>
+			<item>mat4x3h</item>
+			<item>mat4x4h</item>
+		</list>
+
 		<list name="Bit Reinterpretation Built-in Functions">
 			<item>bitcast</item>
 		</list>
@@ -228,7 +266,8 @@
 		</list>
 
 		<list name="Extension Address Spaces">
-			<item>push_constant</item>
+			<item>push_constant</item> <!-- obsolete -->
+			<item>immediate</item>
 		</list>
 
 		<list name="Access Modes">
@@ -311,6 +350,7 @@
 				<keyword attribute="Keyword" context="#stay" String="keyword" />
 				<keyword attribute="Control Flow" context="#stay" String="control" />
 				<keyword attribute="Builtin Type" context="#stay" String="type" />
+				<keyword attribute="Builtin Type" context="#stay" String="Type Aliases" />
 				<keyword attribute="Builtin Function" context="#stay" String="Built-in Functions" />
 			</context>
 			<context attribute="Error" lineEndContext="#stay" name="MemMaybe">