CMake: Rename serenity_* helper functions/macros to ladybird_*

Author: https://github.com/ayeteadoe
Commit: 25f5936dee
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5249
Reviewed-by: https://github.com/gmta ✅

Libraries/LibDevTools/CMakeLists.txt

@@ -23,5 +23,5 @@ set(SOURCES
     DevToolsServer.cpp
 )
 
-serenity_lib(LibDevTools devtools)
+ladybird_lib(LibDevTools devtools)
 target_link_libraries(LibDevTools PRIVATE LibCore LibWeb)