feature: Add screenshots

Author: NeedleInAJayStack

README.md

@@ -5,6 +5,8 @@ This is a [Grafana](https://grafana.com/grafana/) plugin that supports direct co
 and supports standard Haystack API operations as well as custom Axon execution, which is supported by
 [SkySpark](https://skyfoundry.com/product) and [Haxall](https://haxall.io/).
 
+![Dashboard Example](src/img/screenshot/dashboard.png)
+
 ## Installation
 
 Long term, the goal is to get this into the Grafana plugin repository. Until then, I must manually sign the plugin

src/img/screenshot/dashboard.png

@@ -18,7 +18,20 @@
       "large": "img/project-haystack-logo.png"
     },
     "links": [],
-    "screenshots": [],
+    "screenshots": [
+      {
+        "name": "Dashboard",
+        "src": "img/screenshot/dashboard.png"
+      },
+      {
+        "name": "Query Editor",
+        "src": "img/screenshot/query-editor.png"
+      },
+      {
+        "name": "Variable Editor",
+        "src": "img/screenshot/variable-editor.png"
+      }
+    ],
     "version": "%VERSION%",
     "updated": "%TODAY%"
   },