File Layout & Single File Mode

Options:

• useMultipleFiles (default true)
• singleFileName (default schemas.ts)
• placeSingleFileAtRoot (default true) – root of output vs schemas/ subdir
• placeArrayVariantsAtRoot (only for array variants)

Single-file mode:

1. Aggregates generated content (initSingleFile)
2. Writes final bundle (flushSingleFile)
3. Cleans sibling files in target directory
4. Disables variant emission path

Layout conflicts between generator block & JSON config are surfaced (generator block wins).