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

docs/sidebars.js

@@ -7,6 +7,7 @@ module.exports = {
       'guides/formats',
       'guides/taking-photos',
       'guides/recording-videos',
+      'guides/code-scanning',
       {
         type: 'category',
         label: 'Realtime Frame Processing',