feat: build windows dll and call dll in flutter

cmd/binding/main.go

@@ -1,11 +1,21 @@
 package main
 
 import "C"
-import "polaris/cmd"
+import (
+	"os"
+	"polaris/cmd"
+	"polaris/log"
+)
 
 func main() {}
 
 //export Start
 func Start() {
-	cmd.Start()
+	cmd.Start(true)
+}
+
+//export Stop
+func Stop() {
+	log.Infof("stop polaris")
+	os.Exit(0)
 }