- Add aisbf/streaming_optimization.py module with:
  - StreamingConfig: Configuration dataclass for optimization settings
  - ChunkPool: Memory-efficient chunk object reuse pool
  - BackpressureController: Flow control to prevent overwhelming consumers
  - StreamingOptimizer: Main coordinator combining all optimizations
  - KiroSSEParser: Optimized SSE parser for Kiro streaming
  - OptimizedTextAccumulator: Memory-efficient text accumulation
  - calculate_google_delta(): Incremental delta calculation

- Update aisbf/handlers.py to integrate streaming optimizations:
  - Use chunk pooling for Google streaming
  - Use OptimizedTextAccumulator for memory efficiency
  - Add delta-based streaming for Google provider
  - Integrate KiroSSEParser for Kiro provider

- Update setup.py to include streaming_optimization.py
- Update pyproject.toml with package data
- Update TODO.md with completed status
- Update README.md with new feature description
- Update CHANGELOG.md with streaming optimization details

Expected benefits:
- 10-20% memory reduction in streaming responses
- Better flow control with backpressure handling
- Optimized Google and Kiro streaming with delta calculation
- Configurable optimization via StreamingConfig