Initial project scaffold for Setec Partition Wizard

C++17/Qt6 application for disk recovery, repair, flashing, formatting,
and USB security key creation on Windows. Includes CMake build system,
tabbed UI shell with 6 main tabs, core type system with Result<T>
monadic error handling, admin elevation, and dark Catppuccin theme.

cmake/CompilerWarnings.cmake

@@ -0,0 +1,13 @@
+# Compiler warning settings for MSVC and GCC/Clang
+if(MSVC)
+    add_compile_options(/W4 /permissive- /utf-8)
+    # Treat warnings as errors in CI builds
+    if(DEFINED ENV{CI})
+        add_compile_options(/WX)
+    endif()
+else()
+    add_compile_options(-Wall -Wextra -Wpedantic)
+    if(DEFINED ENV{CI})
+        add_compile_options(-Werror)
+    endif()
+endif()