Automatic Input repeat and appending memebers.csv updated code

[muneersyed156]

Added some features

1. Multiple I/O for end-user to enter more than one group for a single execution
2. Appending data to a single members.csv instead of overwriting data
3. To exit from I/O 'Press C key functionality'

After using existing code I found having these features will help end-user to save time and will be more effective to add all data to a single file than overwriting

Please kindly review the code and add it to the repo for better utility

Thank you :)