Metal filter framework

🟣 At the moment, the most important features of metal moudle can be summarized as follows:

• Support iOS and macOS.
• Support operator chain filter.
• Support UIImage, CIImage, CGImage, CMSampleBuffer and CVPixelBuffer add fillters.
• Support quick design filters.
• Support merge multiple filter effects.
• Support fast expansion of output sources.
• Support camera capture effects.
• Support video to add filter special effects.
• Support matrix convolution.
• Support MetalPerformanceShaders related types of filters.
• Support compatible for CoreImage.

A total of 100+ kinds of filters are currently available.✌️

• HarbethDemo