feat: New Pathfinder Rules page (atlas) for docs

[shivasurya]

Description:

🎯 Enhanced Rules Browser with OWASP Java & Mobile Support

🔍 What's Changed

• 📱 Added OWASP Top 10 & Mobile Top 10 categories for Java lang, Android rules filtering
• 🎨 Simplified Android documentation landing page for better readability
• 🔄 Updated rule IDs to follow consistent lowercase format (java/android/*)
• 🧹 Cleaned up rule descriptions by removing redundant security severity info
• 🚀 Improved navigation with direct "Browse Rules" link in main nav
• 📝 Standardized rule documentation format with line breaks after rule IDs

🌟 Key Improvements

1. Better Rule Discovery: Users can now filter Android rules using OWASP Top 10 & Mobile Top 10 categories (M1-M10)
2. Consistent Formatting: Standardized rule IDs and descriptions across all Android WebView rules
3. Simplified Navigation: Direct access to rules browser from homepage
4. Cleaner UI: Removed unused hero image and streamlined documentation layout

Checklist:

• Tests passing (gradle testGo)?
• Lint passing (golangci-lint run this requires golangci-lint)?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.42%. Comparing base (b85bea9) to head (9e832cc).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #200   +/-   ##
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  Coverage   72.42%   72.42%           
=======================================
  Files          16       16           
  Lines        2473     2473           
=======================================
  Hits         1791     1791           
  Misses        639      639           
  Partials       43       43           

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