Introduce FastaChunkParserRope for direct rope-based FASTA parsing, enhance sequence extraction with whitespace skipping and U->T conversion, and update parser logic to support both rope and raw data sources.
- Added extractFastaSeq function to scan sequence bytes directly from rope
- Implemented FastaChunkParserRope for rope-based parsing
- Modified _ParseFastaFile to use rope when available
- Updated sequence handling to support U->T conversion
- Fixed line ending detection for FASTA parsing