Compiles .ksy files to Elixir source files.
mix ksc.compile <input_path> --output <output_dir> [--namespace <namespace>] [--writer]input_path is a single .ksy file or a directory containing .ksy files.
--output specifies the directory where .ex files are written (created if needed).
--namespace sets the module namespace prefix (default: Ksc.Compiled).
--writer additionally generates to_binary/1 and to_file/2 for write-back.