[feat] snowflake client support

branding/motd-cli/motd.json

cmd/snowflake-client/.gitignore

cmd/snowflake-client/main.go

pkg/snowflake/bootstrap.go

pkg/snowflake/lib/interfaces.go

pkg/snowflake/lib/lib_test.go

pkg/snowflake/lib/peers.go

pkg/snowflake/lib/rendezvous.go

pkg/snowflake/lib/snowflake.go

pkg/snowflake/lib/turbotunnel.go

pkg/snowflake/lib/util.go

pkg/snowflake/lib/webrtc.go