cli for adding, checking distribution details

[suryateja1698]

Steps to run

make run

1. Add distributor - ./distrib add distributor1
2. To add permissions for a distributor - ./distrib include distributor1 INDIA
3. To check if distributor has permission - ./distrib check distributor1 ONGOLE-ANDHRAPRADESH-INDIA
4. To list all distributors - ./distrib list
5. To exclude a city for a distributor - ./distrib exclude distributor1 TAMILNADU-INDIA
6. To show distributor information - ./distrib show distributor1
7. To copy permissions from a distributor - ./distrib add distributor2 --parent distributor1

We store the current state(distributor permissions) in current_state.json. If we want to reset all permissions, just remove or delete the json file.