- Introduced dd.h header file with function declarations for various DiskDoubler decompression methods including ADn, DDn, Method 2, Stac LZS, Compact Pro, and LZW.
- Implemented wrapper functions in library.c to expose DiskDoubler decompression methods to the Aaru API.
- Updated library.h to declare the new DiskDoubler functions.
- Added test cases for DiskDoubler decompression methods in dd.cpp, covering ADn and DDn methods with corresponding binary test data.
- Included necessary test data files for ADn and DDn methods in the tests/data directory.
