chore: support TFO for outbounds

component/dialer/options.go

@@ -18,6 +18,7 @@ type option struct {
 	routingMark   int
 	network       int
 	prefer        int
+	tfo           bool
 	resolver      resolver.Resolver
 }
 
@@ -69,6 +70,12 @@ func WithOnlySingleStack(isIPv4 bool) Option {
 	}
 }
 
+func WithTFO(tfo bool) Option {
+	return func(opt *option) {
+		opt.tfo = tfo
+	}
+}
+
 func WithOption(o option) Option {
 	return func(opt *option) {
 		*opt = o