Directory restructure to add scenarios and experiments (#559)

* Updated dir struture with scenarios and experiments dir

Signed-off-by: Amit Kumar Das <amit.das@harness.io>

* Added icons

Signed-off-by: Amit Kumar Das <amit.das@harness.io>

experiments/generic/node-drain/engine.yaml

@@ -0,0 +1,26 @@
+apiVersion: litmuschaos.io/v1alpha1
+kind: ChaosEngine
+metadata:
+  name: nginx-chaos
+  namespace: default
+spec:
+  # It can be active/stop
+  engineState: 'active'
+  #ex. values: ns1:name=percona,ns2:run=nginx 
+  auxiliaryAppInfo: ''
+  chaosServiceAccount: node-drain-sa
+  experiments:
+    - name: node-drain
+      spec:
+        components:
+        # nodeSelector: 
+        #   # provide the node labels
+        #   kubernetes.io/hostname: 'node02'        
+          env:
+            - name: TOTAL_CHAOS_DURATION
+              value: '60'
+              
+            # enter the target node name
+            - name: TARGET_NODE
+              value: ''
+