Changed file header comments in cryptography-related modules from '.cs' to '.vb' to accurately reflect the file types. This improves clarity and consistency in source file documentation.
Implemented the HIGHT block cipher with ECB mode support, including HightAlgorithm, HightCore, and HightEcbTransform classes. Updated the test program to include HIGHT encryption/decryption tests and added support for PaddingMode.None in ARIA and SEED ECB transforms.
