Validate aliases, addresses and phone numbers in the send menu (#176)

- Update the phone number regex
- Check whether the recipient is a valid phone number, alias or address

Reviewed-on: urdt/ussd#176
Co-authored-by: alfred-mk <alfredmwaik@gmail.com>
Co-committed-by: alfred-mk <alfredmwaik@gmail.com>

internal/testutil/mocks/servicemock.go

@@ -47,3 +47,8 @@ func (m *MockAccountService) TokenTransfer(ctx context.Context, amount, from, to
 	args := m.Called()
 	return args.Get(0).(*models.TokenTransferResponse), args.Error(1)
 }
+
+func (m *MockAccountService) CheckAliasAddress(ctx context.Context, alias string) (*dataserviceapi.AliasAddress, error) {
+	args := m.Called()
+	return args.Get(0).(*dataserviceapi.AliasAddress), args.Error(1)
+}