* Add session context outbounds as slice
slice is needed for dialer proxy where two outbounds work on top of each other
There are two sets of target addr for example
It also enable Xtls to correctly do splice copy by checking both outbounds are ready to do direct copy
* Fill outbound tag info
* Splice now checks capalibility from all outbounds
* Fix unit tests
Android client prepares an IP before proxy connection is established. It is useful when connecting to wireguard (or quic) outbound with domain address. E.g. engage.cloudflareclient.com:2408
* feat: wireguard inbound
* feat(command): generate wireguard compatible keypair
* feat(wireguard): connection idle timeout
* fix(wireguard): close endpoint after connection closed
* fix(wireguard): resolve conflicts
* feat(wireguard): set cubic as default cc algorithm in gVisor TUN
* chore(wireguard): resolve conflict
* chore(wireguard): remove redurant code
* chore(wireguard): remove redurant code
* feat: rework server for gvisor tun
* feat: keep user-space tun as an option
* fix: exclude android from native tun build
* feat: auto kernel tun
* fix: build
* fix: regulate function name & fix test
