chore: recovery backups, temp files and misc campaign artifacts

.bak LocalHistory recovery backups, .tmp0/.tmp1, .gitignore update,
reasonix.toml, convert_videoparams.py. Kept as-is from the campaign
branch; cleanup can happen separately on main.

.bak/nodeview/nodeviewitemconnector.h

@@ -0,0 +1,52 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2022 Olive Team
+  Modifications Copyright (C) 2025 mikesolar
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef OAK_NODEVIEWITEMCONNECTOR_H
+#define OAK_NODEVIEWITEMCONNECTOR_H
+
+#include <QGraphicsPolygonItem>
+
+#include "nodeviewcommon.h"
+
+namespace olive
+{
+
+class NodeViewItemConnector : public QGraphicsPolygonItem {
+public:
+	NodeViewItemConnector(bool is_output, QGraphicsItem *parent = nullptr);
+
+	void set_flow_direction(NodeViewCommon::FlowDirection dir);
+
+	bool is_output() const
+	{
+		return output_;
+	}
+
+	virtual QPainterPath shape() const override;
+	virtual QRectF boundingRect() const override;
+
+private:
+	bool output_;
+};
+
+}
+
+#endif // OAK_NODEVIEWITEMCONNECTOR_H