Created OTPConfiguration.GetQrImage (markdown)

OTPConfiguration.GetQrImage.md

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+Namespace: `SimpleOTP.Models`
+
+Assembly: `SimpleOTP.dll`
+
+Generates QR code image for current configuration with Google Chart API.
+```csharp
+public async Task<string> GetQrImage(int qrCodeSize = 300, int requestTimeout = 30);
+```
+### Parameters
+`qrCodeSize` `Int32`
+
+QR code image size in pixels.
+
+`requestTimeout` `Int32`
+
+Web request timeout in seconds.
+
+### Returns
+string-encoded PNG image.