Reorganize docs from 3 tabs to 4 tabs

[alay2shah]

Summary

Reorganized documentation structure from 3 tabs (Documentation, SDK Reference, Examples) into 4 focused tabs (LFM, Customization, Deployment, Examples) to improve information architecture and user navigation.

Key changes:

• Moved ~70 files across new directory structure: /lfm, /customization, /docs (repurposed for Deployment)
• Rewrote docs.json navigation with 4-tab layout and nested groups for iOS SDK, Android SDK, and Model Bundling
• Added Getting Started sections to Customization and Deployment tabs with welcome pages and shared Connect AI Tools page
• Set up 24 redirect rules for backward compatibility with old URL structure
• Updated all internal links across ~50 files to match new paths

Result: Users now have a clearer mental model — LFM is for learning about models, Customization is for fine-tuning, Deployment is for running models, and Examples demonstrates real-world usage.

🤖 Generated with Claude Code

[tuliren]

We may need a more secure and automated way to check all old doc URLs have redirections in new changes.