feat(cli): wire adapters into registry and add detect subcommand

internal/cli/detect.go

@@ -0,0 +1,30 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/lukaszraczylo/harness-sync/internal/adapter"
+)
+
+// NewDetect returns the `detect` subcommand. It prints each registered
+// adapter with whether the underlying harness is installed on this machine.
+func NewDetect(reg *adapter.Registry) *cobra.Command {
+	return &cobra.Command{
+		Use:   "detect",
+		Short: "List adapters and whether each harness is present on this machine",
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			for _, a := range reg.All() {
+				status := "not detected"
+				if a.Detect() {
+					status = "detected"
+				}
+				if _, err := fmt.Fprintf(cmd.OutOrStdout(), "%-14s %s\n", a.Name(), status); err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+	}
+}