[Feature Request] Add support for ignored servers and reconnect to last non-ignored server

[Vagor96]

This feature request consists of two related features:

1. Please add a config option to define a list of servers that don't change the saved last server if you connect to them.
2. Please add a command (e.g. /vreconnect last) to connect to the last non-ignored server

Example:
Velocity has three servers configured: main, minigames, prison
In config.yaml: ignored-servers: [minigames, prison]

Order of events:

1. Player connects to main -> lastserver is main
2. Player switches to minigames -> lastserver is still main since minigames is on ignore-list
3. Player disconnects or runs command /vreconnect last
4. Player (reconnects and) gets transferred to main