Project: svelte
Task (challenging):  1) Add a button with the text 'Random Blogs' in Header to append 100,000 blogs to BlogList at one time. Each blog should have a title formatted in regex 'RandomBlog-[\d]{12}', digits in title is random. 2) Ensure the page will not stuck when 100000 blogs appended. 3) Constraint: DO NOT USE any third-party packages, ONLY Svelte APIs can be used to optimize the performance.