chore(solidity): update copyright attribution to trifle-labs contributors

The Solidity port and EVM-specific work belongs to trifle-labs contributors,
not the original author. The MIT license still references Project Nayuki for
the derived algorithmic portions, satisfying the MIT requirement to retain the
original copyright notice in derivatives.

Updated in: QRCode.sol, QRCodeDemo.sol, Readme.markdown

Co-authored-by: okwme <964052+okwme@users.noreply.github.com>

solidity/Readme.markdown

@@ -181,7 +181,8 @@ Note: the contracts use `viaIR: true` (Yul IR pipeline) to avoid the EVM's
 License
 -------
 
-Copyright © 2025 Project Nayuki. (MIT License)
+Solidity port and EVM optimizations copyright © trifle-labs contributors. (MIT License)
+Based on the C implementation by Project Nayuki.
 https://www.nayuki.io/page/qr-code-generator-library
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of

solidity/contracts/QRCode.sol

@@ -1,7 +1,8 @@
 /*
  * QR Code generator library (Solidity)
  *
- * Copyright (c) Project Nayuki. (MIT License)
+ * Solidity port and EVM optimizations copyright (c) trifle-labs contributors.
+ * Based on the C implementation by Project Nayuki (MIT License).
  * https://www.nayuki.io/page/qr-code-generator-library
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of

solidity/contracts/QRCodeDemo.sol

@@ -1,7 +1,8 @@
 /*
  * QR Code generator demo (Solidity)
  *
- * Copyright (c) Project Nayuki. (MIT License)
+ * Solidity port and EVM optimizations copyright (c) trifle-labs contributors.
+ * Based on the C implementation by Project Nayuki (MIT License).
  * https://www.nayuki.io/page/qr-code-generator-library
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of