CW-608-Fetch-And-Save-Icons-Of-ERC20-And-SPL-Tokens-When-Adding-Them (#1365)

* feat: Fetch and save icons of SPL tokens when adding them

* feat: Implement fetch and save icons for ERC20 tokens when adding them

* fix: Add moralisApiKey to evm secrets

* Add check to ensure decimals cannot be zero

* - Fallback to adding erc20 token from web3dart
- Wrap fetching spl token icon in a try/catch block

---------

Co-authored-by: OmarHatem <omarh.ismail1@gmail.com>

lib/view_model/dashboard/home_settings_view_model.dart

@@ -54,6 +54,7 @@ abstract class HomeSettingsViewModelBase with Store {
         symbol: token.title,
         decimal: token.decimals,
         contractAddress: contractAddress,
+        iconPath: token.iconPath,
       );
 
       await ethereum!.addErc20Token(_balanceViewModel.wallet, erc20token);
@@ -65,6 +66,7 @@ abstract class HomeSettingsViewModelBase with Store {
         symbol: token.title,
         decimal: token.decimals,
         contractAddress: contractAddress,
+        iconPath: token.iconPath,
       );
       await polygon!.addErc20Token(_balanceViewModel.wallet, polygonToken);
     }