Direct/Freedom outbound: Add blockDelay to finalRules (30~90s by default) (#6060)

Document: https://xtls.github.io/config/outbounds/freedom.html#finalruleobject

https://github.com/XTLS/Xray-core/pull/6058#issuecomment-4363489838
https://github.com/XTLS/Xray-core/pull/6058#issuecomment-4363522836
https://github.com/XTLS/Xray-core/pull/6060#issuecomment-4363675060
https://github.com/XTLS/Xray-core/pull/6060#issuecomment-4364587508

infra/conf/freedom_test.go

@@ -45,7 +45,8 @@ func TestFreedomConfig(t *testing.T) {
 					"action": "block",
 					"network": "tcp,udp",
 					"port": "53,443",
-					"ip": ["10.0.0.0/8", "2001:db8::/32"]
+					"ip": ["10.0.0.0/8", "2001:db8::/32"],
+					"blockDelay": "30-60"
 				}, {
 					"action": "allow",
 					"network": ["udp"]
@@ -85,6 +86,10 @@ func TestFreedomConfig(t *testing.T) {
 								},
 							},
 						},
+						BlockDelay: &freedom.Range{
+							Min: 30,
+							Max: 60,
+						},
 					},
 					{
 						Action:   freedom.RuleAction_Allow,