Refactor CMake setup to include CTest after project() call

- Moved CTest inclusion to cpp_library_setup() to ensure it is called after project() declaration.
- Updated comments to clarify the order of operations for dependency tracking and testing support.
- This change aligns with best practices for CMake project configuration.

Author: sean-parent

cpp-library.cmake

@@ -34,10 +34,9 @@ function(cpp_library_enable_dependency_tracking)
     message(STATUS "cpp-library: Dependency tracking will be enabled during project() call")
 endfunction()
 
-# Include CTest for testing support
-include(CTest)
-
 # Include all the component modules
+# Note: CTest is NOT included here because it requires project() to be called first.
+# It will be included in cpp_library_setup() which is called after project().
 include("${CPP_LIBRARY_ROOT}/cmake/cpp-library-setup.cmake")
 include("${CPP_LIBRARY_ROOT}/cmake/cpp-library-testing.cmake")  
 include("${CPP_LIBRARY_ROOT}/cmake/cpp-library-docs.cmake")
@@ -166,6 +165,9 @@ function(cpp_library_setup)
     endif()
     set(ARG_NAME "${PROJECT_NAME}")
 
+    # Include CTest for testing support (must be after project())
+    include(CTest)
+    
     # Calculate clean name (without namespace prefix) for target alias
     # If PROJECT_NAME starts with NAMESPACE-, strip it; otherwise use PROJECT_NAME as-is
     string(REGEX REPLACE "^${ARG_NAMESPACE}-" "" CLEAN_NAME "${ARG_NAME}")