Addresses flickering issue by increasing _changeThreshold_m in hyperiongrabber.cpp from 100 to 5000. This filters out subtle pixel variations that caused unnecessary frame updates to WLED.
Replaced the complex, low-level OpenGL pipeline in HyperionGrabber with a simple, high-level `QImage::scaled()` call.
This change significantly reduces code complexity and improves maintainability without sacrificing performance, as `QImage::scaled()` is highly optimized and often hardware-accelerated. The new implementation is more robust and easier to understand.
This resolves the following issues:
- Removes fragile, hard-to-debug OpenGL code.
- Eliminates potential bugs related to FBOs, shaders, and texture handling.
- Corrects the image data pipeline to ensure raw pixel data is processed consistently.
Resolved the issue where captured images were appearing upside down or flipped.
Implemented a final vertical flip on the QImage after reading from the OpenGL
Framebuffer Object (FBO) to ensure correct orientation before sending to Hyperion.
This completes the basic hardware-accelerated scaling pipeline.
