Add separate Tools module in ApplicationLibCode

[Copilot]

Creates a new ApplicationLibCode/Tools/ library module to improve architecture by separating lightweight utility classes from the main ApplicationLibCode OBJECT library. The new module contains only files with no caf/cvf dependencies — only C++ stdlib and Qt::Core.

New module

ApplicationLibCode/Tools/ — separate static library linking against Qt6::Core and regression-analysis.

Files moved from ApplicationLibCode/Application/Tools/

File	Dependencies
RiaHashTools.h	Pure C++ (header-only)
RiaWeightedMeanCalculator.h/.inl	Pure C++ (template header-only)
RiaWeightedGeometricMeanCalculator.h/cpp	Pure C++
RiaWeightedHarmonicMeanCalculator.h/cpp	Pure C++
enum_bitmask.hpp	Pure C++ (header-only)
RiaStringEncodingTools.h/cpp	C++ + Qt::Core
RiaTimeTTools.h/cpp	C++ + Qt::Core
RiaImageCompareReporter.h/cpp	C++ + Qt::Core
RiaImageFileCompare.h/cpp	Qt::Core
RiaOpenMPTools.h/cpp	Qt::Core + OpenMP
RiaRegressionTextTools.h/cpp	Qt::Core + regression-analysis

CMake integration

• ApplicationLibCode links Tools as PUBLIC — all existing #include directives remain unchanged (no consumer code touched)
• add_subdirectory(ApplicationLibCode/Tools) added to root CMakeLists.txt before ApplicationLibCode