Refactor launcher

[esafirm]

Make ImagePickerLauncher a class instead a function/lambda

This also makes a unified launcher for the camera only and image picker

Ex:

val launcher = registerImagePicker {
  // handler result here
}

// Call image picker
launcher.launch()

// Call with custom config
launcher.launch(ImagePickerConfig { 
  doneButtonText = "Selesai"
})

// Call camera only
launcher.launch(CameraOnlyConfig())