Add libvips for image processing

My apps are processing a lot of (large) images. Therefore I've been running into some OOM issues with my servers. For performance reasons I'd like to switch to libvips for image processing. I've done some benchmarks to show the difference between the image solutions and libvips is clearly the winner.

Test Configuration

Image: 11.57 MB JPEG Operations: Crop to aspect ratio → Resize (Lanczos) → Apply mirror bleed (edges + corners) Iterations: 3 per test

Results

Size	Output Dimensions	Imagick	GD	libvips
300×400mm	4,701 × 5,882 px	43,724ms	1,482ms	233ms
400×500mm	5,882 × 7,064 px	5,100ms	1,855ms	216ms
450×600mm	6,473 × 8,245 px	27,449ms	2,298ms	281ms

Performance Comparison

Size	Fastest	vs GD	vs Imagick
300×400mm	libvips	6.4x faster	188x faster
400×500mm	libvips	8.6x faster	24x faster
450×600mm	libvips	8.2x faster	98x faster