Add rendiff-cli: Professional media QC analysis tool

Standalone CLI tool that provides comprehensive QC analysis without
requiring the API server. Features include:

- 19 QC analysis categories (codec, container, resolution, HDR, etc.)
- Multiple output formats (JSON, text, detailed report)
- Quick file info command for basic metadata
- Full enhanced analysis matching API capabilities
- Batch processing support for multiple files

Commands:
  analyze    - Full QC analysis with all 19 categories
  categories - List available QC analysis categories
  info       - Quick file information (basic metadata only)
  version    - Show version information

Usage:
  rendiff-cli analyze video.mp4 --format report
  rendiff-cli analyze video.mp4 --format json --output result.json
  rendiff-cli info video.mp4
  rendiff-cli categories

Author: alokemajumder