[feat] pure go bitmask vpn implemenation

Makefile

bitmask/bitmask.go

bitmask_go.go

bitmask_go/bonafide.go

bitmask_go/bonafide_test.go

bitmask_go/launcher_linux.go

bitmask_go/main.go

bitmask_go/status.go

bitmask_go/vpn.go

bitmaskd.go

bitmaskd/events.go

bitmaskd/main.go

bitmaskd/vpn.go

main.go

systray.go