Implemented the customer rate card view, including SKU search

src/background/messages.js

@@ -9,6 +9,7 @@ function registerBackgroundMessages({
   requestConsumerTokenService,
   requestConsumptionTrend,
   requestConsumptionPlanDetail,
+  requestRatecardByPlan,
   requestOpptyProducts,
   runtimeApi
 }) {
@@ -116,6 +117,14 @@ runtimeApi.runtime.onMessage.addListener((message, sender, sendResponse) => {
       return true;
     }
 
+    if (message.type === messageTypes.requestRatecardByPlan) {
+      requestRatecardByPlan(message).then(sendResponse).catch(error => sendResponse({
+        ok: false, error: error.message || "Unable to load rate card.",
+        debugRequests: Array.isArray(error.debugRequests) ? error.debugRequests : []
+      }));
+      return true;
+    }
+
     if (message.type === messageTypes.requestConsumptionPlanDetail) {
       requestConsumptionPlanDetail(message).then(sendResponse).catch(error => sendResponse({
         ok: false, error: error.message || "Unable to load consumption plan details.",