feature: created sway language submodule; added styles & config part for a sway language submodule

include/modules/sway/language.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <fmt/format.h>
+#include "ALabel.hpp"
+#include "bar.hpp"
+#include "client.hpp"
+#include "modules/sway/ipc/client.hpp"
+#include "util/json.hpp"
+
+namespace waybar::modules::sway {
+
+class Language : public ALabel, public sigc::trackable {
+ public:
+  Language(const std::string& id, const Json::Value& config);
+  ~Language() = default;
+  auto update() -> void;
+
+ private:
+  void onEvent(const struct Ipc::ipc_response&);
+  void onCmd(const struct Ipc::ipc_response&);
+  
+  std::string      lang_;
+  util::JsonParser parser_;
+  std::mutex       mutex_;
+  Ipc              ipc_;
+};
+
+}  // namespace waybar::modules::sway