feat: add SnapshotClass and VolumeSnapshot example

Author: wozniakjan

deploy/example/snapshot-nfs-dynamic.yaml

@@ -0,0 +1,9 @@
+---
+apiVersion: snapshot.storage.k8s.io/v1
+kind: VolumeSnapshot
+metadata:
+  name: test-nfs-snapshot
+spec:
+  volumeSnapshotClassName: csi-nfs-snapclass
+  source:
+    persistentVolumeClaimName: pvc-nfs-dynamic

deploy/example/snapshotclass-nfs.yaml

@@ -0,0 +1,10 @@
+---
+apiVersion: snapshot.storage.k8s.io/v1
+kind: VolumeSnapshotClass
+metadata:
+  name: csi-nfs-snapclass
+driver: nfs.csi.k8s.io
+deletionPolicy: Delete
+parameters:
+  server: nfs-server.default.svc.cluster.local
+  share: /