Implemented the --show-all and --export-files options for the aditi check command

[rolfedh]

Features Added:

1. --show-all flag: Displays all affected files without truncation (defaults to showing 10 files then "... and X more")
2. --export-files option: Exports the complete list of affected files to a specified file, organized by rule

Implementation Details:

• Added options to both the CLI interface and check command
• Created _display_file_list() helper method in processor for consistent file list display
• Updated display_summary() to support new options
• Export format includes metadata (timestamp, total files, total issues) and groups files by rule name
• Journey command now uses the same file display helper for consistency

Testing Verified:

• Normal truncated output (default behavior preserved)
• --show-all displays all files inline
• --export-files creates a well-formatted text file
• Both options work together
• Export file is sorted and organized by rule name

The implementation provides users flexibility to see complete file lists when needed, while maintaining clean terminal output by default.