Use New 7TV Cosmetics System (#4512)

* feat(seventv): use new cosmetics system

* chore: add changelog entry

* fix: old `clang-format`

* fix: small suggestions pt1

* refactor: add 7tv api wrapper

* fix: small clang-tidy things

* fix: remove unused constants

* fix: old clangtidy

* refactor: rename

* fix: increase interval to 60s

* fix: newline

* fix: Twitch

* docs: add comment

* fix: remove v2 badges endpoint

* fix: deadlock

This is actually really sad.

* fix: remove api entry

* fix: old clang-format

* Sort functions in SeventvBadges.hpp/cpp

* Remove unused vector include

* Add comments to SeventvBadges.hpp functions

* Rename `addBadge` to `registerBadge`

* fix: cleanup eventloop

* ci(test): add timeout

---------

Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/providers/twitch/TwitchChannel.hpp

@@ -254,6 +254,12 @@ private:
     void showLoginMessage();
     /** Joins (subscribes to) a Twitch channel for updates on BTTV. */
     void joinBttvChannel() const;
+    /**
+     * Indicates an activity to 7TV in this channel for this user.
+     * This is done at most once every 60s.
+     */
+    void updateSevenTVActivity();
+    void listenSevenTVCosmetics();
 
     /**
      * @brief Sets the live status of this Twitch channel
@@ -372,6 +378,12 @@ private:
      */
     size_t seventvUserTwitchConnectionIndex_;
 
+    /**
+     * The next moment in time to signal activity in this channel to 7TV.
+     * Or: Up until this moment we don't need to send activity.
+     */
+    QDateTime nextSeventvActivity_;
+
     /** The platform of the last live emote update ("7TV", "BTTV", "FFZ"). */
     QString lastLiveUpdateEmotePlatform_;
     /** The actor name of the last live emote update. */