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/example/src/CameraPage.tsx

@@ -189,6 +189,7 @@ export function CameraPage({ navigation }: Props): React.ReactElement {
                 onError={onError}
                 enableZoomGesture={false}
                 animatedProps={cameraAnimatedProps}
+                exposure={0}
                 enableFpsGraph={true}
                 orientation="portrait"
                 photo={true}