Update dependencies and add new features for improved functionality

- Updated Cargo.lock and Cargo.toml to include new dependencies
- Added new files for backup and watcher functionality in libmarlin
- Introduced integration tests and documentation updates
- Set workspace resolver to version 2 for better dependency resolution

cli-bin/Cargo.toml

@@ -13,6 +13,7 @@ libmarlin          = { path = "../libmarlin" }   # ← core library
 anyhow             = "1"
 clap               = { version = "4", features = ["derive"] }
 clap_complete      = "4.1"
+ctrlc              = "3.4"
 glob               = "0.3"
 rusqlite           = { version = "0.31", features = ["bundled", "backup"] }
 shellexpand        = "3.1"