feat: add worker install and deploy

cmd/rsmon-worker/main_test.go

@@ -3,9 +3,30 @@ package main
 import (
 	"net/http"
 	"net/http/httptest"
+	"os"
 	"testing"
 )
 
+func TestDispatchManagementCommand(t *testing.T) {
+	if handled, _ := dispatchManagementCommand(nil); handled {
+		t.Fatal("empty arguments were handled")
+	}
+	if handled, code := dispatchManagementCommand([]string{"install", "--help"}); !handled || code != 0 {
+		t.Fatalf("install help = handled %t code %d", handled, code)
+	}
+}
+
+func TestSecretValue(t *testing.T) {
+	path := t.TempDir() + "/secret"
+	if err := os.WriteFile(path, []byte("value\n"), 0600); err != nil {
+		t.Fatal(err)
+	}
+	got, err := secretValue("", path)
+	if err != nil || got != "value" {
+		t.Fatalf("secretValue() = %q, %v", got, err)
+	}
+}
+
 func TestProbeLiveness(t *testing.T) {
 	t.Parallel()