feat(cli): add apply subcommand

internal/cli/adapter.go

@@ -0,0 +1,28 @@
+package cli
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/lukaszraczylo/harness-sync/internal/adapter"
+)
+
+// NewAdapter returns the `adapter` parent command with a `list` subcommand.
+func NewAdapter(reg *adapter.Registry) *cobra.Command {
+	list := &cobra.Command{
+		Use:   "list",
+		Short: "List registered adapters",
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			for _, a := range reg.All() {
+				if _, err := fmt.Fprintln(cmd.OutOrStdout(), a.Name()); err != nil {
+					return err
+				}
+			}
+			return nil
+		},
+	}
+	cmd := &cobra.Command{Use: "adapter", Short: "Adapter introspection"}
+	cmd.AddCommand(list)
+	return cmd
+}