Create GT911 Touchscreen component (#4027)

Co-authored-by: clydebarrow <2366188+clydebarrow@users.noreply.github.com>

esphome/components/gt911/binary_sensor/gt911_button.cpp

@@ -0,0 +1,27 @@
+#include "gt911_button.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace gt911 {
+
+static const char *const TAG = "GT911.binary_sensor";
+
+void GT911Button::setup() {
+  this->parent_->register_button_listener(this);
+  this->publish_initial_state(false);
+}
+
+void GT911Button::dump_config() {
+  LOG_BINARY_SENSOR("", "GT911 Button", this);
+  ESP_LOGCONFIG(TAG, "  Index: %u", this->index_);
+}
+
+void GT911Button::update_button(uint8_t index, bool state) {
+  if (index != this->index_)
+    return;
+
+  this->publish_state(state);
+}
+
+}  // namespace gt911
+}  // namespace esphome