rename {wad,bsp}.mat to just .mat

valve/pbr/maps/c0a0.bsp/c0a0.mat

@@ -0,0 +1,12 @@
+// Fix bad material
+{
+"for" "CHROMEBAR"
+//"basecolor_map" "CHROMEBAR.png"
+//"basecolor_map" "-0out_w3.mip"
+//"basecolor_map" "/colors/white.png"
+//"normal_map" "CHROMEBAR_normal.png"
+//"metal_map" "CHROMEBAR_metal.png"
+//"roughness_map" "CHROMEBAR_roughness.png"
+//"metalness" "0"
+//"roughness" "0.3"
+}