added empty ketboard settings page

src/widgets/settingspages/keyboardsettingspage.cpp

@@ -0,0 +1,12 @@
+#include "keyboardsettingspage.hpp"
+
+namespace chatterino {
+namespace widgets {
+namespace settingspages {
+KeyboardSettingsPage::KeyboardSettingsPage()
+    : SettingsPage("Keybindings", "")
+{
+}
+}  // namespace settingspages
+}  // namespace widgets
+}  // namespace chatterino