Add additive KDBX importer

Cargo.toml

@@ -32,6 +32,7 @@ iced = { version = "0.14", features = ["canvas", "tokio"] }
 image = { version = "0.25", default-features = false, features = ["gif", "jpeg", "png"] }
 ironstorage = { path = "crates/storage" }
 keyring-core = "1.0"
+keepass = "0.13.20"
 muda = "0.19"
 pgp = { version = "0.20", default-features = false }
 qrcode = { version = "0.14", default-features = false }