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/LibJS/CMakeLists.txt

@@ -267,7 +267,7 @@ set(SOURCES
     Token.cpp
 )
 
-serenity_lib(LibJS js EXPLICIT_SYMBOL_EXPORT)
+ladybird_lib(LibJS js EXPLICIT_SYMBOL_EXPORT)
 target_link_libraries(LibJS PRIVATE LibCore LibCrypto LibFileSystem LibRegex LibSyntax LibGC)
 
 # Link LibUnicode publicly to ensure ICU data (which is in libicudata.a) is available in any process using LibJS.