[Enhancement] - Topup feature to buy bitcoin

[Nodirbek75]

[Nodirbek75]

1. Button on the home screen that navigates to Buy/Sell Bitcoin screen
2. Buy/Sell Bitcoin screen select action
3. Payment options screen select debit card or bank transfer
4. Wallet select and amount screen
5. if debit card payment, open webview screen integrating fygaro
6. if bank transfer, open Bank details screen

[islandbitcoin]

I made some scaffolding of the top up feature screens on the feat/fygaro branch