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This commit introduces a `QrCodeGenerator` utility object to create QR code bitmaps for both Wi-Fi credentials and URLs. Key features: - **`generateWifiQr`**: Creates a QR code using the standard `WIFI:` format, allowing other devices to connect to a hotspot by scanning the code. It properly escapes special characters in the SSID and password. - **`generateUrlQr`**: Generates a standard QR code for any given URL. - **Implementation**: Uses the `zxing` library to encode the data and converts the resulting `BitMatrix` into an Android `Bitmap`.