LibGfx: Add support for DDS images

Author: https://github.com/stelar7
Commit: 24c5b0e81c
Pull-request: https://github.com/SerenityOS/serenity/pull/7162
Reviewed-by: https://github.com/IdanHo
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/drunderscore
Reviewed-by: https://github.com/linusg

Meta/CMake/all_the_debug_macros.cmake

@@ -182,6 +182,7 @@ set(WASM_BINPARSER_DEBUG ON)
 set(WASM_TRACE_DEBUG ON)
 set(PDF_DEBUG ON)
 set(SOLITAIRE_DEBUG ON)
+set(DDS_DEBUG ON)
 
 # False positive: DEBUG is a flag but it works differently.
 # set(DEBUG ON)