feat: add sctips help

Signed-off-by: Xinwei Xiong(cubxxw-openim) <3293172751nss@gmail.com>

tools/imctl/cmd/imctl/imctl.go

@@ -0,0 +1,15 @@
+// iamctl is the command line tool for iam platform.
+package main
+
+import (
+	"os"
+
+	"github.com/OpenIMSDK/Open-IM-Server/tools/imctl/internal/imctl/cmd"
+)
+
+func main() {
+	command := cmd.NewDefaultIMCtlCommand()
+	if err := command.Execute(); err != nil {
+		os.Exit(1)
+	}
+}