Add url speed test for outbound (#3767)

* add outbound testing functionality with configurable test URL

* use no kernel tun for conflict errors

web/translation/translate.en_US.toml

@@ -460,6 +460,8 @@
 "FreedomStrategyDesc" = "Set the output strategy for the network in the Freedom Protocol."
 "RoutingStrategy" = "Overall Routing Strategy"
 "RoutingStrategyDesc" = "Set the overall traffic routing strategy for resolving all requests."
+"outboundTestUrl" = "Outbound Test URL"
+"outboundTestUrlDesc" = "URL used when testing outbound connectivity."
 "Torrent" = "Block BitTorrent Protocol"
 "Inbounds" = "Inbounds"
 "InboundsDesc" = "Accepting the specific clients."
@@ -523,6 +525,12 @@
 "accountInfo" = "Account Information"
 "outboundStatus" = "Outbound Status"
 "sendThrough" = "Send Through"
+"test" = "Test"
+"testResult" = "Test Result"
+"testing" = "Testing connection..."
+"testSuccess" = "Test successful"
+"testFailed" = "Test failed"
+"testError" = "Failed to test outbound"
 
 [pages.xray.balancer]
 "addBalancer" = "Add Balancer"