[lvgl] Final stage (#7184)

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

esphome/components/lvgl/text/lvgl_text.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include "esphome/components/text/text.h"
+#include "esphome/core/automation.h"
+#include "esphome/core/component.h"
+#include "esphome/core/preferences.h"
+
+namespace esphome {
+namespace lvgl {
+
+class LVGLText : public text::Text {
+ public:
+  void set_control_lambda(std::function<void(const std::string)> control_lambda) {
+    this->control_lambda_ = control_lambda;
+    if (this->initial_state_.has_value()) {
+      this->control_lambda_(this->initial_state_.value());
+      this->initial_state_.reset();
+    }
+  }
+
+ protected:
+  void control(const std::string &value) {
+    if (this->control_lambda_ != nullptr)
+      this->control_lambda_(value);
+    else
+      this->initial_state_ = value;
+  }
+  std::function<void(const std::string)> control_lambda_{};
+  optional<std::string> initial_state_{};
+};
+
+}  // namespace lvgl
+}  // namespace esphome