Implement onboarding reset functionality and enhance backup features

- Added a new method to reset the onboarding state, allowing users to re-initiate the onboarding process.
- Integrated backup creation functionality, enabling users to create encrypted backups of their node identity.
- Updated API endpoints to handle onboarding reset and backup creation requests.
- Enhanced UI components to support the new onboarding reset and backup features, including error handling and user feedback.
- Introduced new dependencies for cryptographic operations and data encoding.

core/archipelago/src/main.rs

@@ -7,6 +7,7 @@ use tracing::info;
 
 mod api;
 mod auth;
+mod backup;
 mod config;
 mod electrs_status;
 mod container;