refactor: move V1 code into v1/ subdirectory

- git mv cmd/ internal/ pkg/ test/ go.mod go.sum Makefile build.sh docs/ v1/
- Create v1/README.md with V1 documentation
- Update root README for V1 + V2 structure
- V1 still builds (cd v1 && go build ./cmd/hostkeeper) and 105 tests pass
- Root is now clean for V2 development

v1/cmd/hostkeeper/delete.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"git.tukangketik.id/swanadiva/hostkeeper/pkg/config"
+)
+
+var deleteForce bool
+
+// deleteCmd represents the delete command
+var deleteCmd = &cobra.Command{
+	Use:   "delete <host-name-or-id>",
+	Short: "Delete a saved SSH host",
+	Long: `Delete a saved SSH host from HostKeeper.
+
+You will be prompted for confirmation unless --force is used.
+
+Examples:
+  # Delete a host with confirmation
+  hostkeeper delete myserver
+
+  # Delete without confirmation
+  hostkeeper delete myserver --force`,
+	Aliases: []string{"rm"},
+	Args:    cobra.ExactArgs(1),
+	RunE:    runDeleteHost,
+}
+
+func init() {
+	deleteCmd.Flags().BoolVar(&deleteForce, "force", false, "delete without confirmation")
+
+	rootCmd.AddCommand(deleteCmd)
+}
+
+func runDeleteHost(cmd *cobra.Command, args []string) error {
+	hostIdentifier := args[0]
+
+	cfg := appCfg
+	if cfg == nil {
+		var err error
+		cfg, err = config.New()
+		if err != nil {
+			return fmt.Errorf("failed to initialize config: %w", err)
+		}
+	}
+
+	store, err := newStorage(cfg)
+	if err != nil {
+		return fmt.Errorf("failed to initialize storage: %w", err)
+	}
+
+	ctx := context.Background()
+
+	host, err := findHost(ctx, store, hostIdentifier)
+	if err != nil {
+		return err
+	}
+
+	// Confirm deletion unless --force is used
+	if !deleteForce {
+		fmt.Printf("Are you sure you want to delete host '%s' (%s@%s:%d)? [y/N]: ",
+			host.Name, host.Username, host.Hostname, host.Port)
+		var response string
+		fmt.Scanln(&response)
+		if response != "y" && response != "Y" && response != "yes" {
+			fmt.Println("Deletion cancelled.")
+			return nil
+		}
+	}
+
+	if err := store.DeleteHost(ctx, host.ID); err != nil {
+		return fmt.Errorf("failed to delete host: %w", err)
+	}
+
+	fmt.Printf("✓ Host '%s' deleted successfully\n", host.Name)
+	return nil
+}