Merged short alt detection back into main 'poor quality' report and removed separate 'short_alt' counts as requested

Refined report structure: Ensure mutually exclusive separation of 'short_alt' vs 'poor_quality' (Generic/Filename) to correct double counting

Refined report structure: Separated legacy 'short_alt' (length only) from 'poor_quality' (all issues) metrics

Refined generic text detection: added partial matches for short phrases (e.g. 'company logo') while allowing branded logos

Refined alt text analysis: added slug detection (e.g. product-12345) and reordered prioritization

Enhanced alt text analysis: added detection for short, sparse, generic, and filename-like alt text

Add short alt text detection (<15 chars) to reports

Initial commit for deployment