Add custom made tools_parallax tool texture

Simply adding a tools_parallax texture I made a long time ago.

Author: lenship2

hammer/materials/tools/tools_parallax.vmt

@@ -0,0 +1,6 @@
+LightmappedGeneric
+{
+$translucent 1
+$basetexture "tools/tools_parallax"
+"%compiletrigger" 1
+}