LLMs.txt Generator Upgrader

Goal

Upgrade llmtxt-generator.py using current app structure and existing apps/web/public/llms.txt, then regenerate outputs. Only add new or missing sections and links. Do not remove, rename, or rewrite existing sections unless the user explicitly asks.

Discovery: apps structure

1. Scan apps/ to understand doc surfaces and routing structure.
2. Note any new top-level doc categories or developer resources that are not represented in the current llms.txt.

Baseline: current llms.txt