Path Resolution, Window Resizing, and HiDPI Support

[francescofugazzi]

1. Dynamic Path Resolution:

• Resolves the issue where the application would fail to find required files due to hardcoded paths. Now, the application dynamically determines its current directory to correctly locate associated files.

2. Window Resizing:

   • The rendering area now adjusts appropriately when the application window is resized, ensuring the display remains consistent and user-friendly.

3. HiDPI Support:

   • Added a new --hidpi command-line flag to scale the ImGui interface by 150%, improving readability on high-resolution displays.

[limacv]

Thanks for the new functionality!