feat(cli): add apply subcommand

internal/cli/adapter_test.go

@@ -0,0 +1,27 @@
+package cli
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/lukaszraczylo/harness-sync/internal/adapter"
+)
+
+func TestAdapterList(t *testing.T) {
+	reg := adapter.NewRegistry()
+	reg.Register(&detectableAdapter{name: "alpha", detect: true})
+	reg.Register(&detectableAdapter{name: "beta", detect: false})
+
+	var buf bytes.Buffer
+	cmd := NewAdapter(reg)
+	cmd.SetArgs([]string{"list"})
+	cmd.SetOut(&buf)
+	require.NoError(t, cmd.Execute())
+
+	out := buf.String()
+	assert.Contains(t, out, "alpha")
+	assert.Contains(t, out, "beta")
+}