Support for LibreTiny platform (RTL8710, BK7231 & other modules) (#3509)

Co-authored-by: Kuba Szczodrzyński <kuba@szczodrzynski.pl>
Co-authored-by: Sam Neirinck <git@samneirinck.com>
Co-authored-by: David Buezas <dbuezas@users.noreply.github.com>
Co-authored-by: Stroe Andrei Catalin <catalin2402@gmail.com>
Co-authored-by: Sam Neirinck <github@samneirinck.be>
Co-authored-by: Péter Sárközi <xmisterhu@gmail.com>
Co-authored-by: Hajo Noerenberg <hn@users.noreply.github.com>

esphome/components/libretiny/lt_component.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#ifdef USE_LIBRETINY
+
+#include "esphome/core/component.h"
+#include "esphome/core/defines.h"
+
+#ifdef USE_SENSOR
+#include "esphome/components/sensor/sensor.h"
+#endif
+#ifdef USE_TEXT_SENSOR
+#include "esphome/components/text_sensor/text_sensor.h"
+#endif
+
+namespace esphome {
+namespace libretiny {
+
+class LTComponent : public Component {
+ public:
+  float get_setup_priority() const override;
+  void dump_config() override;
+
+#ifdef USE_TEXT_SENSOR
+  void set_version_sensor(text_sensor::TextSensor *version) { version_ = version; }
+#endif  // USE_TEXT_SENSOR
+
+ protected:
+#ifdef USE_TEXT_SENSOR
+  text_sensor::TextSensor *version_{nullptr};
+#endif  // USE_TEXT_SENSOR
+};
+
+}  // namespace libretiny
+}  // namespace esphome
+
+#endif  // USE_LIBRETINY