feat(cli): clap surface for import lastpass

Adds the Import command group with a Lastpass subcommand.
Stub returns `not implemented` so the help text is reachable
ahead of the body landing in Task 8.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

crates/relicario-cli/src/main.rs

@@ -100,6 +100,12 @@ enum Commands {
         action: BackupAction,
     },
 
+    /// Import items from another password manager into the unlocked vault.
+    Import {
+        #[command(subcommand)]
+        action: ImportAction,
+    },
+
     /// Attach a file to an item.
     Attach { query: String, file: PathBuf },
 
@@ -309,6 +315,18 @@ enum BackupAction {
     },
 }
 
+#[derive(Subcommand)]
+enum ImportAction {
+    /// Import a LastPass CSV export into the unlocked vault.
+    /// Each row creates a new item with a freshly-minted ID; title
+    /// collisions are kept (no dedup). Failed rows are skipped and
+    /// reported on stderr.
+    Lastpass {
+        /// Path to the LastPass-format CSV export.
+        csv: PathBuf,
+    },
+}
+
 fn main() -> Result<()> {
     let cli = Cli::parse();
     match cli.command {
@@ -323,6 +341,7 @@ fn main() -> Result<()> {
         Commands::Purge { query } => cmd_purge(query),
         Commands::Trash { action } => cmd_trash(action),
         Commands::Backup { action } => cmd_backup(action),
+        Commands::Import { action } => cmd_import(action),
         Commands::Attach { query, file } => cmd_attach(query, file),
         Commands::Attachments { query } => cmd_attachments(query),
         Commands::Extract { query, aid, out } => cmd_extract(query, aid, out),
@@ -1539,6 +1558,16 @@ fn cmd_backup_restore(input: PathBuf, target: PathBuf) -> Result<()> {
     Ok(())
 }
 
+fn cmd_import(action: ImportAction) -> Result<()> {
+    match action {
+        ImportAction::Lastpass { csv } => cmd_import_lastpass(csv),
+    }
+}
+
+fn cmd_import_lastpass(_csv: PathBuf) -> Result<()> {
+    bail!("not implemented yet — Task 8 lands the body")
+}
+
 fn cmd_trash_empty() -> Result<()> {
     use relicario_core::time::now_unix;