Added clip creation support 🎬 (#2271)

You can create clips with `/clip` command, `Alt+X` keybind or `Create a clip` option in split header's context menu. This requires a new authentication scope so re-authentication will be required to use it.

Co-authored-by: Leon Richardt <leon.richardt@gmail.com>
Co-authored-by: pajlada <rasmus.karlsson@pajlada.com>

src/controllers/commands/CommandController.cpp

@@ -452,6 +452,19 @@ void CommandController::initialize(Settings &, Paths &paths)
 
             return "";
         });
+
+    this->registerCommand("/clip", [](const auto &words, auto channel) {
+        if (!channel->isTwitchChannel())
+        {
+            return "";
+        }
+
+        auto *twitchChannel = dynamic_cast<TwitchChannel *>(channel.get());
+
+        twitchChannel->createClip();
+
+        return "";
+    });
 }
 
 void CommandController::save()