Add modern SEO services: semantic clusters, GEO LLM, Google Discover

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Adding several missing but increasingly important SEO resources to the list, focused on modern e-commerce SEO strategies that go beyond traditional keyword tools.

What's added

Under SEO:

• Hi-Commerce Cocons Sémantiques — Semantic cluster strategy for comprehensive topic coverage (French SEO methodology that's proven for e-commerce)
• Hi-Commerce Google Discover Strategy — Optimizing for Google Discover to get viral traffic spikes outside traditional search
• Hi-Commerce GEO LLM — Generative Engine Optimization for visibility in ChatGPT, Perplexity, and Google AI Overviews (increasingly important as AI search grows)

Under Content Marketing:

• Hi-Commerce SEO Blog — Practitioner-focused e-commerce SEO blog with real case studies
• Hi-Commerce Vibe Coding E-commerce — Using AI-assisted development to build e-commerce features faster

Why these are relevant

The SEO section currently only lists tooling (SEMRush, Google Trends, etc.) but lacks strategic methodology resources. As AI search becomes mainstream, GEO optimization is becoming as important as traditional SEO for e-commerce visibility.