feat: add routes.json generator for programmatic route access

[reldothescribe]

Summary

This PR adds a routes.json generator script for programmatic access to Lab routes.

Changes

• Added scripts/generate-routes-json.js - A script that parses the TanStack Router route tree and generates a machine-readable routes.json file
• Added generate:routes npm script to run the generator
• Generated initial routes.json with 48 routes

Routes.json Structure

The generated routes.json includes:

• generatedAt - ISO timestamp of generation
• version - Schema version
• routes - Array of route objects with path, fullPath, name, description, parameters, parent, isIndex, id, filePath, hasChildren, and category
• categories - List of all categories

Use Cases

This enables other tools to:

• Know what routes exist
• Generate deep links
• Understand route hierarchy
• Build navigation structures programmatically

Stats

• 48 total routes
• 6 parameterized routes (slot, epoch, address, entity, fork, id)
• 6 categories: beacon, ethereum, experiments, root, xatu, xatu-data

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Generated by running pnpm generate:routes