feat: mock plugins with real configs

so you no longer need to comment out xpack config in the kibana.dev.yml

plugins/graph/index.js

@@ -0,0 +1,16 @@
+export function graph(kibana) {
+  return new kibana.Plugin({
+    name: 'graph',
+    id: 'graph',
+    configPrefix: 'xpack.graph',
+    config(Joi) {
+      return Joi.object({
+        enabled: Joi.boolean().default(true),
+        canEditDrillDownUrls: Joi.boolean().default(true),
+        savePolicy: Joi.string()
+          .valid(['config', 'configAndDataWithConsent', 'configAndData', 'none'])
+          .default('configAndData'),
+      }).default();
+    },
+  });
+}