feat: Code Scanner API (#1912)

* feat: CodeScanner JS API

* feat: iOS

* Use guard

* Format

* feat: Android base

* fix: Attach Surfaces

* Use isBusy var

* fix: Use separate Queue

* feat: Finish iOS types

* feat: Implement all other code types on Android

* fix: Call JS event

* fix: Pass codetypes on Android

* fix: iOS use Preview coordinate system

* docs: Add comments

* chore: Format code

* Update CameraView+AVCaptureSession.swift

* docs: Add Code Scanner docs

* docs: Update

* feat: Use lazily downloaded model on Android

* Revert changes in CameraPage

* Format

* fix: Fix empty QR codes

* Update README.md

package/ios/Parsers/AVMetadataObject.ObjectType+descriptor.swift

@@ -0,0 +1,94 @@
+//
+//  AVMetadataObject.ObjectType+descriptor.swift
+//  VisionCamera
+//
+//  Created by Marc Rousavy on 03.10.23.
+//  Copyright © 2023 mrousavy. All rights reserved.
+//
+
+import AVFoundation
+import Foundation
+
+extension AVMetadataObject.ObjectType {
+  init(withString string: String) throws {
+    switch string {
+    case "code-128":
+      self = .code128
+      return
+    case "code-39":
+      self = .code39
+      return
+    case "code-93":
+      self = .code93
+      return
+    case "codabar":
+      if #available(iOS 15.4, *) {
+        self = .codabar
+      } else {
+        throw CameraError.codeScanner(.codeTypeNotSupported(codeType: string))
+      }
+      return
+    case "ean-13":
+      self = .ean13
+      return
+    case "ean-8":
+      self = .ean8
+      return
+    case "itf":
+      self = .itf14
+      return
+    case "upc-e":
+      self = .upce
+      return
+    case "qr":
+      self = .qr
+      return
+    case "pdf-417":
+      self = .pdf417
+      return
+    case "aztec":
+      self = .aztec
+      return
+    case "data-matrix":
+      self = .dataMatrix
+      return
+    default:
+      throw EnumParserError.invalidValue
+    }
+  }
+
+  var descriptor: String {
+    if #available(iOS 15.4, *) {
+      if self == .codabar {
+        return "codabar"
+      }
+    }
+
+    switch self {
+    case .code128:
+      return "code-128"
+    case .code39:
+      return "code-39"
+    case .code93:
+      return "code-93"
+    case .ean13:
+      return "ean-13"
+    case .ean8:
+      return "ean-8"
+    case .itf14:
+      return "itf"
+    case .upce:
+      return "upce"
+    case .qr:
+      return "qr"
+    case .pdf417:
+      return "pdf-417"
+    case .aztec:
+      return "aztec"
+    case .dataMatrix:
+      return "data-matrix"
+    default:
+      return "unknown"
+    }
+  }
+}