v0.1.3

• Update all docs to reference v2 5-class NSFW models (nsfw-detection-2-mini/nano)
• Fix broken HuggingFace model links (old nsfw-detector-mini was 404)
• Support both transformers v4 and v5 pipeline API via inspect.signature detection
• Add CI tests for v4/v5 framework compat and automatic markdown link validation