feat(IFK-9): interactive world map, charts, stats banner, timeline

- Add centralized data/countries.json with all 17 countries (EN/DE/FR)
- Add Leaflet choropleth world map with TopoJSON boundaries
- Add stats banner shortcode (enforced/passed/progress/guidelines counts)
- Add Chart.js charts (status donut, age limits bar, legislation timeline)
- Add Mermaid timeline of legislation milestones 2020-2026
- Refactor child-safety-map table to use data file (DRY)
- Update all 3 language articles (EN/DE/FR)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

content/en/child-protection-laws-2026-global-overview.md

@@ -13,8 +13,16 @@ Governments around the world are taking unprecedented action to protect children
 
 Here is what you need to know about the most important child protection laws taking effect this year.
 
+{{< stats-banner >}}
+
+{{< world-map >}}
+
 {{< child-safety-map >}}
 
+{{< law-charts >}}
+
+{{< legislation-timeline >}}
+
 ## Australia: The First Country to Ban Social Media for Under-16s
 
 In December 2025, Australia became the first country in the world to enforce a blanket social media ban for users under 16. The *Online Safety Amendment (Social Media Minimum Age) Act 2024* requires platforms like TikTok, Instagram, Snapchat, YouTube, and X (formerly Twitter) to take "reasonable steps" to prevent minors from creating or maintaining accounts.