ca01e8a7a8
- Added region-based chunk targeting with @container, @prologue, @body, @epilogue selectors for precise edit operations. - Simplified chunk edit operations from 6 variants to 5 (replace, before, after, prepend, append) with unified region parameter. - Removed checksum requirement from insert operations; only replace operations require #CRC suffix in selector. - Added canonical indentation normalization with normalize_indent parameter for consistent tab-based rendering across file types. - Refactored chunk selector format from separate crc/anchor fields to unified selector#CRC@region syntax for mutations. - Added UnsupportedRegion status to chunk read operations for explicit handling of region availability per chunk type.