If you'd like, I can help you for a specific part of this, such as:
Provide a one-click feature to convert 7z-compressed ChessBase files (.CBV or .CBH) into the more universal 7z-compressed PGN format. ⚠️ Development Considerations Chess Pgn Collection 7z
Develop a "Search & Export" tool that filters the 11+ million game database and exports a smaller, specific 7z collection (e.g., "All games by Magnus Carlsen"). : If you'd like, I can help you for