Improved windows plugin windowing and popup menus support

[kunitoki]

This pull request adds extensive debug logging and improves error handling in several modules, primarily focusing on the popup menu system and Windows-specific windowing code. The changes are aimed at making it easier to trace and diagnose issues during development, especially around popup menu behavior and Direct3D rendering failures. Additionally, there are improvements to Windows path handling and minor code cleanups.

Debug Logging and Diagnostics:

• Added detailed debug logging throughout the PopupMenu class to trace menu interactions, submenu visibility, mouse events, and dismissal logic. This should greatly aid in tracking down UI bugs and understanding menu state transitions. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17]
• Added debug output for Direct3D swap chain creation and present calls, as well as error cases for device removal or reset, making graphics debugging on Windows more transparent. [1] [2] [3]

Windows-Specific Improvements:

• Improved Windows path handling by ensuring UNC paths are correctly prefixed for long path support in yup_Files_windows.cpp.
• Enhanced SDL2 window creation on Windows: if a parent window is provided, a custom window class is registered and used to avoid SDL-specific window procedure issues, improving compatibility and stability for child windows.

Code Quality and Minor Fixes:

• Changed a framerate redraw value from integer 0 to floating-point 0.0f for type correctness in PluginEditorWindow.h.
• Minor cleanup in submenu logic by removing an unnecessary assignment to parentMenu.

These changes collectively improve the reliability and debuggability of the UI and graphics systems, especially on Windows platforms.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 79.23%. Comparing base (22cb1fc) to head (26e61fb).

Files with missing lines	Patch %	Lines
modules/yup_gui/menus/yup_PopupMenu.cpp	0.00%	3 Missing ⚠️

❌ Your patch check has failed because the patch coverage (0.00%) is below the target coverage (70.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #121      +/-   ##
==========================================
- Coverage   79.23%   79.23%   -0.01%     
==========================================
  Files         681      681              
  Lines       67363    67361       -2     
==========================================
- Hits        53377    53375       -2     
  Misses      13986    13986              

Files with missing lines	Coverage Δ
modules/yup_gui/menus/yup_PopupMenu.cpp	41.51% <0.00%> (+0.09%)	⬆️

... and 3 files with indirect coverage changes

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