feat: add initial experimental Twitch Eventsub support (#5837)

Co-authored-by: nerix <nerixdev@outlook.de>

src/Application.hpp

@@ -57,6 +57,9 @@ class ITwitchUsers;
 namespace pronouns {
     class Pronouns;
 }  // namespace pronouns
+namespace eventsub {
+    class IController;
+}  // namespace eventsub
 
 class IApplication
 {
@@ -109,6 +112,7 @@ public:
     virtual IStreamerMode *getStreamerMode() = 0;
     virtual ITwitchUsers *getTwitchUsers() = 0;
     virtual pronouns::Pronouns *getPronouns() = 0;
+    virtual eventsub::IController *getEventSub() = 0;
 };
 
 class Application : public IApplication
@@ -174,6 +178,7 @@ private:
     std::unique_ptr<IStreamerMode> streamerMode;
     std::unique_ptr<ITwitchUsers> twitchUsers;
     std::unique_ptr<pronouns::Pronouns> pronouns;
+    std::unique_ptr<eventsub::IController> eventSub;
 #ifdef CHATTERINO_HAVE_PLUGINS
     std::unique_ptr<PluginController> plugins;
 #endif
@@ -221,6 +226,7 @@ public:
     SeventvEmotes *getSeventvEmotes() override;
     SeventvEventAPI *getSeventvEventAPI() override;
     pronouns::Pronouns *getPronouns() override;
+    eventsub::IController *getEventSub() override;
 
     ILinkResolver *getLinkResolver() override;
     IStreamerMode *getStreamerMode() override;