implement-payjoin (#1949)

* Initial Payjoin

* Initial Payjoin

* More payjoin stuff

* Minor fixes

* Minor fixes

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Fix minor bug causes by data inconsistency in the btc utxos

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Initial Payjoin

* Initial Payjoin

* More payjoin stuff

* Minor fixes

* Minor fixes

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Fix minor bug causes by data inconsistency in the btc utxos

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Minor cleanup

* Fix Rebase issues

* Move PJ Receiver to isolate

* Add Payjoin Setting

* Payjoin Sender are now isolated

* Added Payjoin sessions to tx overview. Fix Fee issue with payjoin

* Clean up code

* Fix taproot for payjoin

* Fix CI Errors

* Add Payjoin UI elements and details page

* Add Payjoin UI elements and details page

* Fix Translations

* feat: Detect Payjoin URIs in pasted text and show to the User sending Payjoin

* feat: rename pjUri to payjoinURI for more code clarity

* Update res/values/strings_pl.arb

Co-authored-by: cyan <cyjan@mrcyjanek.net>

* Update cw_bitcoin/lib/payjoin/manager.dart

Co-authored-by: cyan <cyjan@mrcyjanek.net>

* Update cw_bitcoin/lib/payjoin/manager.dart

Co-authored-by: cyan <cyjan@mrcyjanek.net>

* feat: Disable Payjoin per default

* feat: Disable Payjoin fully if disabled or no Inputs available

* feat: Resume Payjoin if app comes back to foreground

* chore: Revert overly aggressive code formats

* feat: show correct Payjoin amount for receivers

* feat: Improved payjoin status

* feat: Show payjoin errors on payjoin details screen

* deps: update flutter to 3.27.4

* feat: Revert localisations

* bug: Remove duplicate transaction id on payjoin details

* style: remove double await in payjoin sender

* refactor(cw_bitcoin): Refactor method signatures and convert constructor to factory

* refactor(cw_bitcoin): Refactor wallet service and PSBT signer for cleaner code

Removed unnecessary `CakeHive` dependency and refactored `BitcoinWallet` initialization to use `payjoinSessionSource`. Improved code readability in `PsbtSigner` by reformatting lines and simplifying constructor methods for `UtxoWithPrivateKey`.

* fix: Resume Payjoin Sessions and load PJUri after sleep

* feat: Add "Copy Payjoin URL button" to receive screen

* fix: Add "Payjoin enabled"-Box below QR Code on the receive screen

* fix: Set payjoin_enabled color to black independent of the theme

* refactor: Payjoin session management and cleanup unused code.

---------

Co-authored-by: Omar Hatem <omarh.ismail1@gmail.com>
Co-authored-by: cyan <cyjan@mrcyjanek.net>

lib/view_model/send/send_view_model.dart

@@ -619,6 +619,7 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
           priority: priority!,
           feeRate: feesViewModel.customBitcoinFeeRate,
           coinTypeToSpendFrom: coinTypeToSpendFrom,
+          payjoinUri: _settingsStore.usePayjoin ? payjoinUri : null,
         );
       case WalletType.litecoin:
         return bitcoin!.createBitcoinTransactionCredentials(
@@ -855,4 +856,10 @@ abstract class SendViewModelBase extends WalletChangeListenerViewModel with Stor
 
     return false;
   }
+
+  @computed
+  bool get usePayjoin => _settingsStore.usePayjoin;
+
+  @observable
+  String? payjoinUri;
 }