🐛 Fix: SavedStateProvider already registered in fragment

[priyankj-simform]

Closes #51 - SavedStateProvider with the given key is already registered
I also added a fragment demo for compatibility.

Update Features :

• 🐛 Fixes Getting error while open fragment second time : SavedStateProvider with the given key is already registered #51
• ✨ New fragment demo to show how to use SSImagePicker in the fragment.

Major File Changes:

🚧 Modified

• PickerConfigManager.kt - Checked if a SavedStateProvider is already registered.

📚 Usage:

• You can run the app module. Choose the preferred demo of either activity and fragment and open the image picker.