feat: Add Linux ARM64 support and cleanup build system
- Add ARM64 architecture support for Linux builds
- Fix case-sensitive header includes (ueye.h → uEye.h) for Unix systems
- Update CMake modules to find ARM64 library paths:
* Add /opt/ids/ueye/lib/aarch64-linux-gnu for IDS uEye SDK
* Add aarch64-linux-gnu paths to GStreamer module
- Add ARM64 packaging support in main CMakeLists.txt
- Make intervalometer conditional on IDS uEye availability
- Remove 28 unused CMake Find modules for camera vendors:
* ATK, Aptina, Bitflow, Cairo, EDT, Euresys, FreeImage
* GigESim, Glew, GTK2, Imperx, IOtech, KAYA, Matrox
* National Instruments, OpenCV, OpenGL, Phoenix, Pleora
* Pylon, QCam, Sapera, XCLIB, and utility libraries
- Retain only essential modules for GStreamer plugin development
Successfully builds all 8 plugins on ARM64: idsueye, intervalometer,
linescan, bayerutils, extractcolor, select, misb, videoadjust
Tested on: Linux ARM64 (aarch64) with GStreamer 1.16.3
73afb1f671