Add full implementation: core engine, UI, build fixes, and compilation

- Implement all core modules: disk I/O, partition tables, filesystem
  formatting, recovery, imaging, diagnostics, security, and maintenance
- Implement all UI tabs with full widget layouts and backend integration
- Fix MSVC compilation: NOMINMAX, WIN32_LEAN_AND_MEAN, missing includes
  (winioctl.h, bcrypt.h, shellapi.h, cwctype), type mismatches, and
  POSIX macro conflicts
- Add Guid implementation (Types.cpp), move DiskAccessMode to Types.h
- Add CMake presets with embedded MSVC/SDK environment for Git Bash builds
- Add build scripts, key generation, icon resources, and windeployqt
- Include pre-built hwdiag library and third-party integration

third_party/hwdiag/HWDIAG_LICENSE.txt

@@ -0,0 +1,14 @@
+Hardware Diagnostics Support Library (libspw_hwdiag)
+====================================================
+
+Copyright (c) 2026 Setec Hardware Division
+All rights reserved.
+
+This library is provided as a pre-compiled binary for use with
+Setec Partition Wizard. Source code is not distributed.
+
+Redistribution and use in binary form is permitted provided that
+the above copyright notice and this permission notice appear in
+all copies of the software.
+
+THIS SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.