The texture array used by WS30 requires that all component textures be the same size and format. This commit adds an alpha channel to those png file used as primary textures in materials.xml files which did not have one.
Unused duplicate/downsampled and .dds-only textures are deleted, unused unique .png are moved to Unused for possible future use
Signed-off-by: Vivian Meazza <vivian.meazza@lineone.net>
