Leddevices source tree refactoring (#461)

* rework structure of leddevice source tree

* fix data type vor v4l sig detection value in webui

* automate leddevicefactory.cpp

libsrc/leddevice/dev_spi/LedDeviceSk6812SPI.h

@@ -0,0 +1,45 @@
+#pragma once
+
+// hyperion incluse
+#include "ProviderSpi.h"
+
+///
+/// Implementation of the LedDevice interface for writing to Sk6801 led device via SPI.
+///
+class LedDeviceSk6812SPI : public ProviderSpi
+{
+public:
+	///
+	/// Constructs specific LedDevice
+	///
+	/// @param deviceConfig json device config
+	///
+	LedDeviceSk6812SPI(const QJsonObject &deviceConfig);
+
+	/// constructs leddevice
+	static LedDevice* construct(const QJsonObject &deviceConfig);
+
+	///
+	/// Sets configuration
+	///
+	/// @param deviceConfig the json device config
+	/// @return true if success
+	bool init(const QJsonObject &deviceConfig);
+	
+private:
+	///
+	/// Writes the led color values to the led-device
+	///
+	/// @param ledValues The color-value per led
+	/// @return Zero on succes else negative
+	///
+	virtual int write(const std::vector<ColorRgb> &ledValues);
+
+	RGBW::WhiteAlgorithm _whiteAlgorithm;
+	
+        const int SPI_BYTES_PER_COLOUR;
+
+	uint8_t bitpair_to_byte[4];
+	
+	ColorRgbw _temp_rgbw;
+};