feat: Separate usecases (decouple microphone, video, photo) (#168)

* Add props

* add props (iOS)

* Add use-cases conditionally

* Update CameraView+RecordVideo.swift

* Update RecordingSession.swift

* reconfigure on change

* Throw correct errors

* Check for audio permission

* Move `#if` outward

* Throw appropriate errors

* Update CameraView+RecordVideo.swift

* fix Splashscreen

* Dynamic filePath

* Fix video extension

* add `avci` and `m4v` file types

* Fix RecordVideo errors

* Fix audio setup

* Enable `photo`, `video` and `audio`

* Check for `video={true}` in frameProcessor

* format

* Remove unused DispatchQueue

* Update docs

* Add `supportsPhotoAndVideoCapture`

* Fix view manager

* Fix error not being propagated

* Catch normal errors too

* Update DEVICES.mdx

* Update CAPTURING.mdx

* Update classdocs

ios/React Utils/Callback.swift

@@ -0,0 +1,38 @@
+//
+//  Callback.swift
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 07.06.21.
+//  Copyright © 2021 mrousavy. All rights reserved.
+//
+
+import Foundation
+
+/**
+ Represents a callback to JavaScript. Syntax is the same as with Promise.
+ */
+class Callback {
+  init(_ callback: @escaping RCTResponseSenderBlock) {
+    self.callback = callback
+  }
+
+  func reject(error: CameraError, cause: NSError?) {
+    callback([NSNull(), makeReactError(error, cause: cause)])
+  }
+
+  func reject(error: CameraError) {
+    reject(error: error, cause: nil)
+  }
+
+  func resolve(_ value: Any?) {
+    callback([value, NSNull()])
+  }
+
+  func resolve() {
+    resolve(nil)
+  }
+
+  // MARK: Private
+
+  private let callback: RCTResponseSenderBlock
+}