Implement basic EXIF support

api/image_get.go

api/image_list.go

docs/EXIF.md

model/image.go

task/image_resize_processor.go

ui/src/api/model/Image.ts

ui/src/components/ImageView.tsx

ui/src/metadata/ContrastProcessing.ts

ui/src/metadata/ExposureMode.ts

ui/src/metadata/ExposureProgram.ts

ui/src/metadata/Flash.ts

ui/src/metadata/FlashMode.ts

ui/src/metadata/ImageMetadata.ts

ui/src/metadata/LightSource.ts

ui/src/metadata/MeteringMode.ts

ui/src/metadata/Ratio.ts

ui/src/metadata/SceneMode.ts

ui/src/metadata/SharpnessProcessing.ts

ui/src/metadata/SubjectDistanceRange.ts

ui/src/metadata/WhiteBalance.ts