[Feature Request] Cloud Backup for Spark or all connections

[DoktorShift]

1. Backup the seed encrypted in Cloude using Google Drive, iCloud or other solutions.

https://bitcoin.design/guide/daily-spending-wallet/backup-and-recovery/cloud-backup/

2. Wallet requires import backup functionallity (second stream to deliver backup beside typing 12 words manually) with resolving encryption to provide 12 words mnemonic.

[DoktorShift]

Considering implementing this flow exclusively for Spark Wallet.

Additionally, a backup mechanism for NWC connection strings could be discussed. However, this is optional, as the NWC layer functions purely as a wallet interface. The underlying wallet itself remains active and accessible even if the NWC string is lost. New one can be generated in the nwc server and provided again to use BuhoGO as interface.

From this perspective, backing up the NWC string is a convenience feature rather than a requirement for wallet continuity.