Quine

Create a command-line utility in C that implements content-defined delta compression between two directories, A and B. The tool should treat all files from both directories as a single, lexicographically sorted, contiguous binary stream. It needs to use content-defined chunking (CDC) based on a Rabin rolling hash over a 48-byte window, declaring boundaries when the low 14 bits of the hash are zero. The compression process should build a patch file containing `REF` opcodes (global offset and length) for matching chunks found in A, and `LIT` opcodes for new content. The decompressor must resolve offsets using a slot table derived from file size manifests.