added streamview widget

src/widgets/streamview.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <QUrl>
+#include <QWidget>
+#include <memory>
+
+class QWebEngineView;
+
+namespace chatterino {
+class Channel;
+
+namespace widgets {
+class StreamView : public QWidget
+{
+public:
+    StreamView(std::shared_ptr<Channel> channel, QUrl url);
+
+private:
+    QWebEngineView *stream;
+};
+}  // namespace widgets
+}  // namespace chatterino