feat: add lazy loading feature in storybook

Author: parthlambdatest

commands/storybook.js

@@ -67,6 +67,10 @@ async function storybook(serve, options) {
         // Get storyIds to be rendered 
         let storyIds = static.filterStories(dirPath, storybookConfig)
         let maxStories = storybookConfig.chunkSize || 100;
+        let lazyLoadedStories = [];
+        if (Array.isArray(storybookConfig.lazyLoadedStories) && storybookConfig.lazyLoadedStories.length > 0) {
+            lazyLoadedStories = storybookConfig.lazyLoadedStories;
+        }
 
         // Upload Storybook static
         await static.getSignedUrl(options)
@@ -149,7 +153,8 @@ async function storybook(serve, options) {
                         storyIds: storyIds,
                         waitForTimeout: storybookConfig.waitForTimeout,
                         customViewports: storybookConfig.customViewports,
-                        useOnlyCustomViewports: storybookConfig.useOnlyCustomViewports
+                        useOnlyCustomViewports: storybookConfig.useOnlyCustomViewports,
+                        lazyLoadedStories: lazyLoadedStories
                     },
                     git: {
                         branch: currentBranch || commit.branch|| '',