Added readmes to projects

RGB.NET.Devices.Logitech/README.md

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+[RGB.NET](https://github.com/DarthAffe/RGB.NET) Device-Provider-Package for Logitech-Devices.
+
+## Usage
+This provider follows the default pattern and does not require additional setup.
+
+```csharp
+surface.Load(LogitechDeviceProvider.Instance);
+```
+
+Since the logitech SDK does not provide device information only known devices will work.
+You can add detection for additional devices by adding entires for them to the respective static `DeviceDefinitions` on the `LogitechDeviceProvider`.
+
+# Required SDK
+This providers requires native SDK-dlls.
+You can get them directly from Logitech at [https://www.logitechg.com/en-us/innovation/developer-lab.html](https://www.logitechg.com/en-us/innovation/developer-lab.html) (Direct Link: [https://www.logitechg.com/sdk/LED_SDK_9.00.zip](https://www.logitechg.com/sdk/LED_SDK_9.00.zip))
+
+Since the SDK-dlls are native it's important to use the correct architecture you're building your application for. (If in doubt you can always include both.)
+
+### x64
+`Lib\LogitechLedEnginesWrapper\x64\LogitechLedEnginesWrapper.dll` from the SDK-zip needs to be distributed as `<application-directory>\x64\LogitechLedEnginesWrapper.dll`
+
+You can use other, custom paths by adding them to `LogitechDeviceProvider.PossibleX64NativePaths`.
+
+### x86
+`Lib\LogitechLedEnginesWrapper\x86\LogitechLedEnginesWrapper.dll` from the SDK-zip needs to be distributed as `<application-directory>\x86\LogitechLedEnginesWrapper.dll`
+
+You can use other, custom paths by adding them to `LogitechDeviceProvider.PossibleX86NativePaths`.