Add minimum and maximum password length requirements

Fix egress interface command

Bug fixes

* Ensure interface is up before assigning routes
* Fix loading of peer config on application boot

Improvements and bug fixes

* Enable IPv6 support for WireGuard tunnels
* Enable stricter cookie security
* Generate cookie signing salt on `firezone-ctl reconfigure`
* Remove annoying flash success notifications
* Don't write sensitive env vars to conf files
* Fix node config variables

Bug fixes and improvements

* Fixed successive calls to `firezone-ctl reconfigure`
* Reduced chances of phoenix intermittent restart timeout
* Implemented IPv4 / IPv6 forwarding on setup

Fix wireguard pub key config

* Fix feedback link

Remove device columns

First public release