Add WLED support (#1092)

A component to support [WLED](https://github.com/Aircoookie/WLED/wiki/UDP-Realtime-Control).
This allows to control addressable LEDs over WiFi/UDP, by pushing data right into LEDs.

The most useful to use [Prismatik](https://github.com/psieg/Lightpack) to create
an immersive effect on PC.

It supports all WLED protocols:
- WARLS
- DRGB
- DRGBW
- DNRGB
- WLED Notifier

Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>

esphome/components/wled/wled_light_effect.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/light/addressable_light_effect.h"
+
+#include <vector>
+#include <memory>
+
+class UDP;
+
+namespace esphome {
+namespace wled {
+
+class WLEDLightEffect : public light::AddressableLightEffect {
+ public:
+  WLEDLightEffect(const std::string &name);
+
+ public:
+  void start() override;
+  void stop() override;
+  void apply(light::AddressableLight &it, const light::ESPColor &current_color) override;
+  void set_port(uint16_t port) { this->port_ = port; }
+
+ protected:
+  void blank_all_leds_(light::AddressableLight &it);
+  bool parse_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+  bool parse_notifier_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+  bool parse_warls_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+  bool parse_drgb_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+  bool parse_drgbw_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+  bool parse_dnrgb_frame_(light::AddressableLight &it, const uint8_t *payload, uint16_t size);
+
+ protected:
+  uint16_t port_{0};
+  std::unique_ptr<UDP> udp_;
+  uint32_t blank_at_{0};
+  uint32_t dropped_{0};
+};
+
+}  // namespace wled
+}  // namespace esphome