Event entity support (#6451)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/template/event/template_event.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/event/event.h"
+
+namespace esphome {
+namespace template_ {
+
+class TemplateEvent : public Component, public event::Event {};
+
+}  // namespace template_
+}  // namespace esphome