Routertl Ip Index

Create a system for managing and indexing FPGA IP packages for use with the RouteRTL SDK. I need a structure where each package is defined by a YAML descriptor file located in `packages/<namespace>/<name>/<version>.yml`. This descriptor must specify the IP source (using git URL and a pinned SHA or semver tag), the included HDL files, and compatibility metadata like the target library and language (e.g., vhdl or verilog). The system should include a mechanism, likely a Python script, to auto-regenerate a machine-readable `catalog.json` file at the root whenever any package YAML changes. Please also include instructions on how to add a new package and how to run the regeneration process locally.