protocols: add xdg_toplevel_tag_v1 support

Adds a new windowrule to target windows by xdgTag, xdgtag:

src/protocols/XDGTag.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <vector>
+#include "WaylandProtocol.hpp"
+#include "xdg-toplevel-tag-v1.hpp"
+
+class CXDGToplevelResource;
+
+class CXDGToplevelTagManagerResource {
+  public:
+    CXDGToplevelTagManagerResource(UP<CXdgToplevelTagManagerV1>&& resource);
+
+    bool good();
+
+  private:
+    UP<CXdgToplevelTagManagerV1> m_resource;
+};
+
+class CXDGToplevelTagProtocol : public IWaylandProtocol {
+  public:
+    CXDGToplevelTagProtocol(const wl_interface* iface, const int& ver, const std::string& name);
+
+    virtual void bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id);
+
+  private:
+    void destroyResource(CXDGToplevelTagManagerResource* res);
+
+    //
+    std::vector<UP<CXDGToplevelTagManagerResource>> m_vManagers;
+
+    friend class CXDGToplevelTagManagerResource;
+};
+
+namespace PROTO {
+    inline UP<CXDGToplevelTagProtocol> xdgTag;
+};