chore: Complete REPODB feature in dataset TODO list

feat: Refactor repodb script to use pathlib and improve data processing

chore: Add .gitignore file and ignore .DS_Store

feat: Implement graph creation and visualization from documents

refactor: Refactor code and improve readability for dataset sider

fix: Update dataset status for "prism" to complete.

refactor: Simplify data file download process

feat: Refactor PRISM dataset processing and file structure

refactor: Refactor and enhance data analysis for Prism dataset

feat: Refactor Corum dataset download and script file

updated readme