Export Tasks to CSV

I'm thrilled to share with you some amazing new features for the Task Timer app, which helps you plan and optimize your time better. Here are some of the highlights:

- Export task list to CSV: You can now export your task list to a comma-separated values (CSV) file, which you can open and edit in any spreadsheet software. This allows you to backup, share, or analyze your data more easily.

- Redesign UI layout: I have redesigned the user interface layout to make it more intuitive and user-friendly. You can now access all the main functions from the top menu bar.