Design Problem
1. Implement a basic file system managed from within a file. The file system should have the following capabilities:
i. List files stored along with their sizes.
ii. Create files
iii. Allow changes to files
iv. Delete files
2. Extend the above file system to store information about the files: created time, modified time etc.
3. Make changes to the above file system to allow it to handle directory information. Allow users to copy and move files between directories.