config: add tag dispacther and window rule (#6211)

src/helpers/TagKeeper.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <string>
+#include <set>
+
+class CTagKeeper {
+  public:
+    bool               isTagged(const std::string& tag, bool strict = false);
+    bool               applyTag(const std::string& tag, bool dynamic = false);
+    bool               removeDynamicTags();
+
+    inline const auto& getTags() {
+        return m_tags;
+    };
+
+  private:
+    std::set<std::string> m_tags;
+};