feature: Add web support

[retyui]

Summary

Make module cross-platform:

• Issue: https://github.com/callstack/react-native-image-editor/issues/47
• Add Web support
• Add a new optional prop format?: 'jpeg' | 'png' | 'webp'
• Update README

Test plan

1. Create a new Expo project

   npx create-expo-app -t expo-template-blank-typescript

2. Run web yarn web:

3. Link a library yarn add /path/to/package/image-editor locally

4. Try to crop image:

   import ImageEditor from '@react-native-community/image-editor'
   
   ImageEditor.cropImage('https://images.pexels.com/photos/842711/pexels-photo-842711.jpeg?auto=compress&cs=tinysrgb&w=1260&h=750&dpr=2', {
     "resizeMode": "cover",
     "offset": {
         "x": 1125,
         "y": 750
     },
     "size": {
         "width": 1125,
         "height": 750
     },
     "quality": 0.7,
     "format": "jpeg"
   })

Video:

https://github.com/callstack/react-native-image-editor/assets/4661784/74d94d63-2df8-484b-ad74-9f919a80c8ae