Add Haier climate component (#4001)

* Basic functionality works

* Cleanup

* Add tests

* Separate header

* Fix send_data_

* Formatting fix

* Add __init__.py

* Fix type

* Add codeowners

* Rename supported_swing_modes

* Use multiple swing modes, same as midea platform

* Add CLIMATE_FAN_QUIET handler

* PR fixes

esphome/components/haier/haier.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/climate/climate.h"
+#include "esphome/components/uart/uart.h"
+
+namespace esphome {
+namespace haier {
+
+enum Mode : uint8_t { MODE_SMART = 0, MODE_COOL = 1, MODE_HEAT = 2, MODE_ONLY_FAN = 3, MODE_DRY = 4 };
+enum FanSpeed : uint8_t { FAN_MAX = 0, FAN_MIDDLE = 1, FAN_MIN = 2, FAN_AUTO = 3 };
+enum SwingMode : uint8_t { SWING_OFF = 0, SWING_VERTICAL = 1, SWING_HORIZONTAL = 2, SWING_BOTH = 3 };
+
+class HaierClimate : public climate::Climate, public uart::UARTDevice, public PollingComponent {
+ public:
+  void loop() override;
+  void update() override;
+  void dump_config() override;
+  void control(const climate::ClimateCall &call) override;
+  void set_supported_swing_modes(const std::set<climate::ClimateSwingMode> &modes) {
+    this->supported_swing_modes_ = modes;
+  }
+
+ protected:
+  climate::ClimateTraits traits() override;
+  void read_state_(const uint8_t *data, uint8_t size);
+  void send_data_(const uint8_t *message, uint8_t size);
+  void dump_message_(const char *title, const uint8_t *message, uint8_t size);
+  uint8_t get_checksum_(const uint8_t *message, size_t size);
+
+ private:
+  uint8_t data_[37];
+  std::set<climate::ClimateSwingMode> supported_swing_modes_{};
+};
+
+}  // namespace haier
+}  // namespace esphome