feat: Add 7TV Emotes and Badges (#4002)

Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/providers/seventv/SeventvBadges.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "common/Aliases.hpp"
+#include "util/QStringHash.hpp"
+
+#include <boost/optional.hpp>
+#include <common/Singleton.hpp>
+
+#include <memory>
+#include <shared_mutex>
+#include <unordered_map>
+
+namespace chatterino {
+
+struct Emote;
+using EmotePtr = std::shared_ptr<const Emote>;
+
+class SeventvBadges : public Singleton
+{
+public:
+    void initialize(Settings &settings, Paths &paths) override;
+
+    boost::optional<EmotePtr> getBadge(const UserId &id);
+
+private:
+    void loadSeventvBadges();
+
+    // Mutex for both `badgeMap_` and `emotes_`
+    std::shared_mutex mutex_;
+
+    std::unordered_map<QString, int> badgeMap_;
+    std::vector<EmotePtr> emotes_;
+};
+
+}  // namespace chatterino