Multihop release

[luker983]

• Mutihop support! Chain together an arbitrary number of servers
• All Wiretap tunnels now require 2 WireGuard interfaces, this enables end-to-end encrypted tunnels that scale well across many nodes
• New --outbound flag allows client to initiate handshake
• Demo environment updated with an extra network for testing the new architecture
• New logo and diagrams
• New status command to view the layout of the Wiretap network
• New add server and add client commands to add new server and client nodes
• Now requires >=go1.20
• Significant performance improvements thanks to upstream wireguard-go changes