Include Firewall Functionality

### Issue Details

Currently, I am unable to entirely block traffic from a particular program. Let's say, if a program runs in the background calling home and if I need to block all traffic from the program, I am unable to do that.

### Proposed solution

Implement a firewall functionality such that the user is able to instantly allow or block network access for a program.

A 'Firewall' setting could be implemented (Left navigation bar on Settings page) which when clicked takes us to the Firewall page and on that page, the user would see the list of all the 'Installed' programs. On this page, the user should be able to toggle a switch on or off to allow or block traffic from/to that program.

A view filter could be added on that page to show:

- All
- Installed Programs
- Windows (built-in) programs

### Alternative solution

I am not aware if there is one at the moment.