feat: Implement exposure (#2173)

* feat: Implement `exposure` (iOS)

* Update Podfile.lock

* Format

* Expose exposure in format

* Set exposure in Camera2

* fix: Fix exposure calculation

* Add exposure docs

package/android/src/main/java/com/mrousavy/camera/CameraView.kt

@@ -78,6 +78,7 @@ class CameraView(context: Context) :
   var isActive = false
   var torch: Torch = Torch.OFF
   var zoom: Float = 1f // in "factor"
+  var exposure: Float = 1f // TODO: Implement exposure bias
   var orientation: Orientation = Orientation.PORTRAIT
   var enableZoomGesture: Boolean = false
     set(value) {
@@ -198,6 +199,7 @@ class CameraView(context: Context) :
         config.fps = fps
         config.enableLowLightBoost = lowLightBoost ?: false
         config.torch = torch
+        config.exposure = exposure
 
         // Zoom
         config.zoom = zoom