add touch event hooks (#395)

pages/Plugins/Development/Event-list.md

@@ -27,10 +27,13 @@ These are all the events that can be listened to using Event Hooks.
 | submap | fired on a submap change | std::string | ✕ |
 | mouseMove | fired when the cursor moves. Param is coords. | const Vector2D | ✔ |
 | mouseButton | fired on a mouse button press | wlr_pointer_button_event* | ✔ |
+| touchDown | fired on a touch down event | wlr_touch_down_event* | ✔ |
+| touchUp | fired on a touch up event | wlr_touch_up_event* | ✔ |
+| touchMove | fired on a touch motion event | wlr_touch_motion_event* | ✔ |
 | activeLayout | fired on a keyboard layout change. String pointer temporary, not guaranteed after execution of the handler finishes. | std::vector<void*>{SKeyboard*, std::string*} | ✕ |
 | preRender | fired before a frame for a monitor is about to be rendered | CMonitor* | ✕ |
 | screencast | fired when the screencopy state of a client changes. Keep in mind there might be multiple separate clients. | std::vector<uint64_t>{state, framesInHalfSecond, owner} | ✕ |
 | render | fired at various stages of rendering to allow your plugin to render stuff. See `src/SharedDefs.hpp` for a list with explanations | eRenderStage | ✕ |
 | windowtitle | emitted when a window title changes. | CWindow* | ✕ |
 | configReloaded | emitted after the config is reloaded | nullptr | ✕ |
-| preConfigReload | emitted before a config reload | nullptr | ✕ |
+| preConfigReload | emitted before a config reload | nullptr | ✕ |