Feature/diet for images

[flexbox]

2 things

1. update all images to load them faster
   
2. migrate HTML tags to View, Text and Button from react-native core

[anisurrahman072]

Incredible amount of work you put in here. I appreciate your time once again 🔥

• I especially love the Image optimizations. So far, I understand that you downgrade the image sizes. Does that sound correct?

• Thanks you corrected some spelling mistakes too 🤟

• Just one point, I'm a bit concerned. Code still has some <h1> <h2> etc HTML tags. Also, do you have any comments about importing <View>, <Text> etc? As readers may not understand, from where those are coming. Or we may mention in a side NOTE that those are from the react-native core.

[flexbox]

@anisurrahman072 the name of the book is "React-Native-Advanced-Guide" so I believe they will catch up, if not they can google stuff.

✅ migrated h1, h2 to Text