renamed a bunch of files and classes

src/commandmanager.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <QString>
+
+namespace chatterino {
+class CommandManager
+{
+public:
+    CommandManager() = delete;
+
+    void execCommand(QString command);
+    void selectSplitRelative(int dx, int dy);
+    void moveSplitRelative(int dx, int dy);
+};
+}