scripts: add compare-states, related to #2337

Allows to quickly find the bad block and compare application
logs. Theoretically could also walk through the MPT to find the difference
there, but it's not needed now.

scripts/compare-dumps/compare-dumps_test.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/config"
+	"github.com/nspcc-dev/neo-go/pkg/core/native"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCompatibility(t *testing.T) {
+	cs := native.NewContracts(config.ProtocolConfiguration{})
+	require.Equal(t, cs.Ledger.ID, int32(ledgerContractID))
+}